Fix Codacy issues

17 files changed, 729 insertions, 450 deletions

diff --git a/libraries/openieee/build_1164.py b/libraries/openieee/build_1164.py
index 40a7ba7e2..ed151dd64 100755
--- a/libraries/openieee/build_1164.py
+++ b/libraries/openieee/build_1164.py
@@ -20,123 +20,159 @@
 import sys
 
 # Supported versions
-V87=0
-V93=1
-V08=2
+V87 = 0
+V93 = 1
+V08 = 2
 
-binary_funcs = [ "and", "nand", "or", "nor", "xor" ]
+binary_funcs = ["and", "nand", "or", "nor", "xor"]
 
 # Python modelisation of std_ulogic type.
 std_logic = "UX01ZWLH-"
 
 # Normalization map.
-ux01_map = { 'U': 'U',
-             'X': 'X', 'Z': 'X', 'W': 'X', '-': 'X',
-             '0': '0', 'L': '0',
-             '1': '1', 'H': '1' }
-
-def sl_and(a,b):
-    """and definition"""
+ux01_map = {
+    "U": "U",
+    "X": "X",
+    "Z": "X",
+    "W": "X",
+    "-": "X",
+    "0": "0",
+    "L": "0",
+    "1": "1",
+    "H": "1",
+}
+
+
+def sl_and(a, b):
+    """'and' definition."""
     na = ux01_map[a]
     nb = ux01_map[b]
-    if na == '0' or nb == '0':
-        return '0'
-    if na == 'U' or nb == 'U':
-        return 'U'
-    if na == 'X' or nb == 'X':
-        return 'X'
-    return '1'
+    if na == "0" or nb == "0":
+        return "0"
+    if na == "U" or nb == "U":
+        return "U"
+    if na == "X" or nb == "X":
+        return "X"
+    return "1"
+
 
 def sl_not(a):
-    """not definition"""
+    """'not' definition."""
     na = ux01_map[a]
-    if na == 'U':
-        return 'U'
-    if na == 'X':
-        return 'X'
-    if na == '1':
-        return '0'
+    if na == "U":
+        return "U"
+    if na == "X":
+        return "X"
+    if na == "1":
+        return "0"
     else:
-        return '1'
+        return "1"
+
+
+def sl_or(a, b):
+    """'or' definition."""
+    return sl_not(sl_and(sl_not(a), sl_not(b)))
+
 
-def sl_or(a,b):
-    "or definition"
-    return sl_not(sl_and (sl_not(a), sl_not(b)))
+def sl_xor(a, b):
+    """'xor' definition."""
+    return sl_or(sl_and(a, sl_not(b)), sl_and(sl_not(a), b))
 
-def sl_xor(a,b):
-    "xor definition"
-    return sl_or(sl_and(a, sl_not(b)),
-                 sl_and(sl_not(a), b))
 
 # Stream to write.
-out=sys.stdout
+out = sys.stdout
+
 
 def w(s):
-    "Write S to the output"
+    """Write S to the output."""
     out.write(s)
 
+
 def gen_log_table2(name, func):
-    "Generate a logic table for binary operator NAME using its model FUNC"
-    w("""
+    """Generate a logic table for binary operator NAME using its model FUNC."""
+    w(
+        """
   constant {0}_table : table_2d :=
   --  UX01ZWLH-
-    (""".format(name))
+    (""".format(
+            name
+        )
+    )
     for a in std_logic:
         w('"')
         for b in std_logic:
-            w(func (a, b))
+            w(func(a, b))
         w('"')
-        if a != '-':
-            w(',')
+        if a != "-":
+            w(",")
         else:
-            w(' ')
-        w('   -- {}\n'.format(a))
-        w('     ')
-    w(');\n')
+            w(" ")
+        w("   -- {}\n".format(a))
+        w("     ")
+    w(");\n")
+
 
 def gen_log_table1(name, func):
-    "Generate a logic table for unary operator NAME using its model FUNC"
-    w("""
+    """Generate a logic table for unary operator NAME using its model FUNC."""
+    w(
+        """
   constant {0}_table : table_1d :=
   --  UX01ZWLH-
-     """.format(name))
+     """.format(
+            name
+        )
+    )
     w('"')
     for b in std_logic:
-        w(func (b))
+        w(func(b))
     w('";\n')
 
+
 def disp_tables(version):
-    "Generate logic tables"
+    """Generate logic tables."""
     gen_log_table2("and", sl_and)
-    gen_log_table2("nand", lambda a,b : sl_not(sl_and(a, b)))
+    gen_log_table2("nand", lambda a, b: sl_not(sl_and(a, b)))
     gen_log_table2("or", sl_or)
-    gen_log_table2("nor", lambda a,b : sl_not(sl_or(a,b)))
+    gen_log_table2("nor", lambda a, b: sl_not(sl_or(a, b)))
     gen_log_table2("xor", sl_xor)
     if version >= V93:
-        gen_log_table2("xnor", lambda a,b : sl_not(sl_xor(a,b)))
+        gen_log_table2("xnor", lambda a, b: sl_not(sl_xor(a, b)))
     gen_log_table1("not", sl_not)
 
-vec_types = ['ulogic', 'logic']
+
+vec_types = ["ulogic", "logic"]
+
 
 def disp_scalar_binary(fun):
-    "Generate scalar binary function body"
-    w("""
+    """Generate scalar binary function body."""
+    w(
+        """
   function "{0}" (l : std_ulogic; r : std_ulogic) return UX01 is
   begin
     return {0}_table (l, r);
-  end "{0}";\n""".format(fun))
+  end "{0}";\n""".format(
+            fun
+        )
+    )
+
 
 def disp_scalar_unary(fun):
-    "Generate scalar unary function body"
-    w("""
+    """Generate scalar unary function body."""
+    w(
+        """
   function "{0}" (l : std_ulogic) return UX01 is
   begin
     return {0}_table (l);
-  end "{0}";\n""".format(fun))
+  end "{0}";\n""".format(
+            fun
+        )
+    )
+
 
 def disp_vec_binary(func, typ):
-    "Generate vector binary function body"
-    w("""
+    """Generate vector binary function body."""
+    w(
+        """
   function "{0}" (l, r : std_{1}_vector) return std_{1}_vector
   is
     subtype res_type is std_{1}_vector (1 to l'length);
@@ -154,11 +190,16 @@ def disp_vec_binary(func, typ):
       end loop;
     end if;
     return res;
-  end "{0}";\n""".format(func, typ))
+  end "{0}";\n""".format(
+            func, typ
+        )
+    )
+
 
 def disp_vec_unary(func, typ):
-    "Generate vector unary function body"
-    w("""
+    """Generate vector unary function body."""
+    w(
+        """
   function "{0}" (l : std_{1}_vector) return std_{1}_vector
   is
     subtype res_type is std_{1}_vector (1 to l'length);
@@ -169,11 +210,16 @@ def disp_vec_unary(func, typ):
       res (I) := {0}_table (la (I));
     end loop;
     return res;
-  end "{0}";\n""".format(func, typ))
+  end "{0}";\n""".format(
+            func, typ
+        )
+    )
+
 
 def disp_scal_vec_binary(func, typ):
-    "Generate scalar-vector binary function body"
-    w("""
+    """Generate scalar-vector binary function body."""
+    w(
+        """
   function "{0}" (l : std_{1}_vector; r : std_{1})
     return std_{1}_vector
   is
@@ -185,11 +231,16 @@ def disp_scal_vec_binary(func, typ):
       res (I) := {0}_table (la (I), r);
     end loop;
     return res;
-  end "{0}";\n""".format(func, typ))
+  end "{0}";\n""".format(
+            func, typ
+        )
+    )
+
 
 def disp_vec_scal_binary(func, typ):
-    "Generate vector-scalar binary function body"
-    w("""
+    """Generate vector-scalar binary function body."""
+    w(
+        """
   function "{0}" (l : std_{1}; r : std_{1}_vector)
     return std_{1}_vector
   is
@@ -201,12 +252,17 @@ def disp_vec_scal_binary(func, typ):
       res (I) := {0}_table (l, ra (I));
     end loop;
     return res;
-  end "{0}";\n""".format(func, typ))
+  end "{0}";\n""".format(
+            func, typ
+        )
+    )
+
 
 def disp_vec_reduction(func, typ):
-    "Generate reduction function body"
-    init = '1' if func in ['and', 'nand'] else '0'
-    w("""
+    """Generate reduction function body."""
+    init = "1" if func in ["and", "nand"] else "0"
+    w(
+        """
   function "{0}" (l : std_{1}_vector) return std_{1}
   is
     variable res : std_{1} := '{2}';
@@ -215,7 +271,11 @@ def disp_vec_reduction(func, typ):
       res := {0}_table (l(I), res);
     end loop;
     return res;
-  end "{0}";\n""".format(func, typ, init))
+  end "{0}";\n""".format(
+            func, typ, init
+        )
+    )
+
 
 def gen_shift(is_left, plus, minus):
     if is_left:
@@ -224,9 +284,11 @@ def gen_shift(is_left, plus, minus):
         s = "res (1 {0} r to res'right) := la (1 to l'length {1} r);\n"
     w("      " + s.format(plus, minus))
 
+
 def disp_shift_funcs(func, typ):
-    "Generate shift functions"
-    w("""
+    """Generate shift functions."""
+    w(
+        """
   function "{0}" (l : std_{1}_vector; r : integer)
     return std_{1}_vector
   is
@@ -234,29 +296,43 @@ def disp_shift_funcs(func, typ):
     alias la : res_type is l;
     variable res : res_type := (others => '0');
   begin
-    if r >= 0 then\n""".format(func, typ))
-    gen_shift(func == "sll", '+', '-')
+    if r >= 0 then\n""".format(
+            func, typ
+        )
+    )
+    gen_shift(func == "sll", "+", "-")
     w("    else\n")
-    gen_shift(func != "sll", '-', '+')
-    w("""    end if;
+    gen_shift(func != "sll", "-", "+")
+    w(
+        """    end if;
     return res;
-  end "{0}";\n""".format(func))
+  end "{0}";\n""".format(
+            func
+        )
+    )
+
 
 def gen_rot(is_left, plus, minus):
     if is_left:
-        t = ["res (1 to res'right {1} rm) := la (rm {0} 1 to la'right);",
-             "res (res'right {1} rm + 1 to res'right) := la (1 to rm);"]
+        t = [
+            "res (1 to res'right {1} rm) := la (rm {0} 1 to la'right);",
+            "res (res'right {1} rm + 1 to res'right) := la (1 to rm);",
+        ]
     else:
-        t = ["res (1 {0} rm to res'right) := la (1 to la'right {1} r);",
-             "res (1 to rm) := la (la'right {1} rm + 1 to la'right);"]
+        t = [
+            "res (1 {0} rm to res'right) := la (1 to la'right {1} r);",
+            "res (1 to rm) := la (la'right {1} rm + 1 to la'right);",
+        ]
     for s in t:
         w("      ")
         w(s.format(plus, minus))
-        w('\n')
+        w("\n")
+
 
 def disp_rot_funcs(func, typ):
-    "Generate rotation functions"
-    w("""
+    """Generate rotation functions."""
+    w(
+        """
   function "{0}" (l : std_{1}_vector; r : integer)
     return std_{1}_vector
   is
@@ -265,16 +341,24 @@ def disp_rot_funcs(func, typ):
     variable res : res_type;
     constant rm : integer := r mod l'length;
   begin
-    if r >= 0 then\n""".format(func, typ))
-    gen_rot(func == "rol", '+', '-')
+    if r >= 0 then\n""".format(
+            func, typ
+        )
+    )
+    gen_rot(func == "rol", "+", "-")
     w("    else\n")
-    gen_rot(func != "rol", '-', '+')
-    w("""    end if;
+    gen_rot(func != "rol", "-", "+")
+    w(
+        """    end if;
     return res;
-  end "{0}";\n""".format(func, typ))
+  end "{0}";\n""".format(
+            func
+        )
+    )
+
 
 def disp_all_log_funcs(version):
-    "Generate all function bodies for logic operators"
+    """Generate all function bodies for logic operators."""
     for f in binary_funcs:
         disp_scalar_binary(f)
     disp_scalar_unary("not")
@@ -293,9 +377,11 @@ def disp_all_log_funcs(version):
             disp_rot_funcs("rol", v)
             disp_rot_funcs("ror", v)
 
+
 def disp_sv_to_bv_conv(typ):
-    "Generate logic vector to bit vector function body"
-    w("""
+    """Generate logic vector to bit vector function body."""
+    w(
+        """
   function to_bitvector (s : std_{0}_vector; xmap : bit := '0')
     return bit_vector
   is
@@ -317,11 +403,16 @@ def disp_sv_to_bv_conv(typ):
       res (I) := b;
     end loop;
     return res;
-  end to_bitvector;\n""".format(typ))
+  end to_bitvector;\n""".format(
+            typ
+        )
+    )
+
 
 def disp_bv_to_sv_conv(typ):
-    "Generate bit vector to logic vector function body"
-    w("""
+    """Generate bit vector to logic vector function body."""
+    w(
+        """
   function to_std{0}vector (b : bit_vector) return std_{0}_vector is
     subtype res_range is natural range b'length - 1 downto 0;
     alias ab : bit_vector (res_range) is b;
@@ -331,33 +422,44 @@ def disp_bv_to_sv_conv(typ):
       res (I) := bit_to_std (ab (I));
     end loop;
     return res;
-  end to_std{0}vector;\n""".format(typ))
+  end to_std{0}vector;\n""".format(
+            typ
+        )
+    )
+
 
-def disp_sv_to_sv_conv(s,d):
-    "Generate logic vector to logic vector function body"
-    w("""
+def disp_sv_to_sv_conv(s, d):
+    """Generate logic vector to logic vector function body."""
+    w(
+        """
   function to_std{1}vector (s : std_{0}_vector) return std_{1}_vector
   is
     subtype res_type is std_{1}_vector (s'length - 1 downto 0);
   begin
     return res_type (s);
-  end to_std{1}vector;\n""".format(s,d))
+  end to_std{1}vector;\n""".format(
+            s, d
+        )
+    )
+
 
 def disp_all_conv_funcs(version):
-    "Generate conversion function bodies"
+    """Generate conversion function bodies."""
     for v in vec_types:
         disp_sv_to_bv_conv(v)
     for v in vec_types:
         disp_bv_to_sv_conv(v)
     if version >= V08:
-        disp_bv_to_sv_conv('logic')
-    disp_sv_to_sv_conv('logic', 'ulogic')
-    disp_sv_to_sv_conv('ulogic', 'logic')
+        disp_bv_to_sv_conv("logic")
+    disp_sv_to_sv_conv("logic", "ulogic")
+    disp_sv_to_sv_conv("ulogic", "logic")
+
 
 def disp_conv_vec_vec(typ, v):
-    "Generate function body for vector conversion"
-    utyp = typ.upper();
-    w("""
+    """Generate function body for vector conversion."""
+    utyp = typ.upper()
+    w(
+        """
   function to_{1} (s : std_{2}_vector) return std_{2}_vector
   is
     subtype res_type is std_{2}_vector (1 to s'length);
@@ -368,21 +470,31 @@ def disp_conv_vec_vec(typ, v):
       res (i) := std_to_{0} (sa (i));
     end loop;
     return res;
-  end to_{1};\n""".format(typ, utyp, v))
+  end to_{1};\n""".format(
+            typ, utyp, v
+        )
+    )
+
 
 def disp_conv_std(typ):
-    "Generate function body for scalar conversion"
-    utyp = typ.upper();
-    w("""
+    """Generate function body for scalar conversion."""
+    utyp = typ.upper()
+    w(
+        """
   function to_{1} (s : std_ulogic) return {1} is
   begin
     return std_to_{0} (s);
-  end to_{1};\n""".format(typ, utyp))
+  end to_{1};\n""".format(
+            typ, utyp
+        )
+    )
+
 
 def disp_conv_bv_vec(typ, v):
-    "Generate function body for bit vector conversion"
-    utyp = typ.upper();
-    w("""
+    """Generate function body for bit vector conversion."""
+    utyp = typ.upper()
+    w(
+        """
   function to_{0} (b : bit_vector) return std_{1}_vector
   is
     subtype res_range is natural range 1 to b'length;
@@ -393,20 +505,29 @@ def disp_conv_bv_vec(typ, v):
       res (i) := bit_to_x01 (ba (i));
     end loop;
     return res;
-  end to_{0};\n""".format(utyp, v))
+  end to_{0};\n""".format(
+            utyp, v
+        )
+    )
+
 
 def disp_conv_b_t(typ):
-    "Generate function body for bit conversion"
-    utyp = typ.upper();
-    w("""
-  function to_{1} (b : bit) return {1} is
+    """Generate function body for bit conversion."""
+    w(
+        """
+  function to_{0} (b : bit) return {0} is
   begin
     return bit_to_x01 (b);
-  end to_{1};\n""".format(typ, utyp))
+  end to_{0};\n""".format(
+            typ.upper()
+        )
+    )
+
 
 def disp_conv_01():
-    "Generate to_01 bodies"
-    w("""
+    """Generate to_01 bodies."""
+    w(
+        """
   function to_01 (s : std_{0}_vector; xmap : std_ulogic := '0')
     return std_{0}_vector
   is
@@ -422,9 +543,13 @@ def disp_conv_01():
       end case;
     end loop;
     return res;
-  end to_01;\n""".format("ulogic"))
+  end to_01;\n""".format(
+            "ulogic"
+        )
+    )
     w("")
-    w("""
+    w(
+        """
   function to_01 (s : std_{0}; xmap : std_ulogic := '0')
     return std_{0} is
   begin
@@ -433,9 +558,13 @@ def disp_conv_01():
       when '1' | 'H' => return '1';
       when others    => return xmap;
     end case;
-  end to_01;\n""".format("ulogic"))
+  end to_01;\n""".format(
+            "ulogic"
+        )
+    )
     w("")
-    w("""
+    w(
+        """
   function to_01 (s : bit_vector; xmap : std_ulogic := '0')
     return std_{0}_vector
   is
@@ -446,40 +575,53 @@ def disp_conv_01():
       res (i) := bit_to_std (sa (i));
     end loop;
     return res;
-  end to_01;\n""".format("ulogic"))
+  end to_01;\n""".format(
+            "ulogic"
+        )
+    )
     w("")
-    w("""
+    w(
+        """
   function to_01 (s : bit; xmap : std_ulogic := '0')
     return std_{0} is
   begin
     return bit_to_std(s);
-  end to_01;\n""".format("ulogic"))
+  end to_01;\n""".format(
+            "ulogic"
+        )
+    )
+
 
 def disp_cond():
-    w("""
+    w(
+        """
   function "??" (l : std_ulogic) return boolean is
   begin
     return l = '1' or l = 'H';
-  end "??";\n""")
+  end "??";\n"""
+    )
+
 
 def disp_all_norm_funcs(version):
-    "Generate all function bodies for conversion"
+    """Generate all function bodies for conversion."""
     if version >= V08:
         disp_conv_01()
-    for typ in [ "x01", "x01z", "ux01" ]:
+    for typ in ["x01", "x01z", "ux01"]:
         for v in vec_types:
             disp_conv_vec_vec(typ, v)
-        disp_conv_std (typ)
+        disp_conv_std(typ)
         for v in vec_types:
             disp_conv_bv_vec(typ, v)
         disp_conv_b_t(typ)
     if version >= V08:
         disp_cond()
 
+
 def disp_all_isx_funcs(version):
-    "Generate all function bodies for isx functions"
+    """Generate all function bodies for isx functions."""
     for v in vec_types:
-        w("""
+        w(
+            """
   function is_X (s : std_{0}_vector) return boolean is
   begin
     for i in s'range loop
@@ -488,49 +630,61 @@ def disp_all_isx_funcs(version):
       end if;
     end loop;
     return false;
-  end is_X;\n""".format(v))
+  end is_X;\n""".format(
+                v
+            )
+        )
 
-    w("""
+    w(
+        """
   function is_X (s : std_ulogic) return boolean is
   begin
     return std_x (s);
-  end is_X;\n""")
+  end is_X;\n"""
+    )
 
 
 # Patterns to replace
-pats = {'  @TAB\n' : disp_tables,
-        '  @LOG\n' : disp_all_log_funcs,
-        '  @CONV\n': disp_all_conv_funcs,
-        '  @NORM\n': disp_all_norm_funcs,
-        '  @ISX\n' : disp_all_isx_funcs }
+pats = {
+    "  @TAB\n": disp_tables,
+    "  @LOG\n": disp_all_log_funcs,
+    "  @CONV\n": disp_all_conv_funcs,
+    "  @NORM\n": disp_all_norm_funcs,
+    "  @ISX\n": disp_all_isx_funcs,
+}
+
+spec_file = "std_logic_1164.proto"
+proto_file = "std_logic_1164-body.proto"
 
-spec_file='std_logic_1164.proto'
-proto_file='std_logic_1164-body.proto'
 
 def gen_body(filename, version):
     global out
-    out = open(filename, 'w')
-    w('--  This -*- vhdl -*- file was generated from ' + proto_file + '\n')
+    out = open(filename, "w")
+    w("--  This -*- vhdl -*- file was generated from " + proto_file + "\n")
     keep = True
     for line in open(proto_file):
         if line in pats:
             pats[line](version)
             continue
-        if line == '  @BEG V08\n':
-            keep = (version == V08)
+        if line == "  @BEG V08\n":
+            keep = version == V08
             continue
-        if line == '  @END V08\n':
+        if line == "  @END V08\n":
             keep = True
             continue
         if keep:
             w(line)
     out.close()
 
-VDICT={'--V87':  lambda x: x == V87,
-       '--!V87': lambda x: x != V87,
-       '--V93':  lambda x: x == V93,
-       '--V08':  lambda x: x == V08,
-       '--!V08': lambda x: x != V08}
+
+VDICT = {
+    "--V87": lambda x: x == V87,
+    "--!V87": lambda x: x != V87,
+    "--V93": lambda x: x == V93,
+    "--V08": lambda x: x == V08,
+    "--!V08": lambda x: x != V08,
+}
+
 
 def preprocess_line(line, version):
     for p in VDICT:
@@ -538,28 +692,30 @@ def preprocess_line(line, version):
         if pos >= 0:
             if not VDICT[p](version):
                 return None
-            l = line[:pos].rstrip() + '\n'
+            l = line[:pos].rstrip() + "\n"
             return l
     return line
 
+
 def copy_spec(dest, version):
-    out=open(dest, 'w')
+    out = open(dest, "w")
     for line in open(spec_file):
         l = preprocess_line(line, version)
         if l is not None:
             out.write(l)
     out.close()
 
+
 # Copy spec
-copy_spec('v87/std_logic_1164.vhdl', V87)
-copy_spec('v93/std_logic_1164.vhdl', V93)
-copy_spec('v08/std_logic_1164.vhdl', V08)
+copy_spec("v87/std_logic_1164.vhdl", V87)
+copy_spec("v93/std_logic_1164.vhdl", V93)
+copy_spec("v08/std_logic_1164.vhdl", V08)
 
 # Generate bodies
-gen_body('v87/std_logic_1164-body.vhdl', V87)
+gen_body("v87/std_logic_1164-body.vhdl", V87)
 
 binary_funcs.append("xnor")
-gen_body('v93/std_logic_1164-body.vhdl', V93)
+gen_body("v93/std_logic_1164-body.vhdl", V93)
 
-vec_types = ['ulogic']
-gen_body('v08/std_logic_1164-body.vhdl', V08)
+vec_types = ["ulogic"]
+gen_body("v08/std_logic_1164-body.vhdl", V08)
diff --git a/libraries/openieee/build_numeric.py b/libraries/openieee/build_numeric.py
index df6c8515f..53700dc42 100755
--- a/libraries/openieee/build_numeric.py
+++ b/libraries/openieee/build_numeric.py
@@ -21,40 +21,44 @@
 #  along with GHDL; see the file COPYING.md.  If not see
 #  <http://www.gnu.org/licenses/>.
 
-import re
 import sys
 
 # My python 'style' and knowledge is basic...  Do not hesitate to comment.
 
-binary_funcs = [ "and", "nand", "or", "nor", "xor" ]
-compare_funcs = [ "=", "/=", ">", ">=", "<", "<=" ]
+binary_funcs = ["and", "nand", "or", "nor", "xor"]
+compare_funcs = ["=", "/=", ">", ">=", "<", "<="]
 
-vec_types = ['UNSIGNED', 'SIGNED']
+vec_types = ["UNSIGNED", "SIGNED"]
 
-logics = ['bit', 'std']
-logic_types = {'bit' : 'bit', 'std': 'sl_x01' }
-logic_undefs = {'bit' : "'0'", 'std': "'X'" }
+logics = ["bit", "std"]
+logic_types = {"bit": "bit", "std": "sl_x01"}
+logic_undefs = {"bit": "'0'", "std": "'X'"}
 
-logic = 'xx' # Current logic, either bit or std
+logic = "xx"  # Current logic, either bit or std
 
-v93=False
+v93 = False
 
 # Stream to write.
-out=sys.stdout
+out = sys.stdout
+
 
 def w(s):
-    "Write S to the output"
+    """Write S to the output."""
     out.write(s)
 
+
 def logic_type():
     return logic_types[logic]
 
+
 def logic_undef():
     return logic_undefs[logic]
 
+
 def disp_vec_binary(func, typ):
-    "Generate the body of a vector binary logic function"
-    res = """
+    """Generate the body of a vector binary logic function."""
+    res = (
+        """
   function "{0}" (l, r : {1}) return {1}
   is
     subtype res_type is {1} (l'length - 1 downto 0);
@@ -66,7 +70,9 @@ def disp_vec_binary(func, typ):
       assert false
         report "NUMERIC_STD.""{0}"": arguments are not of the same length"
         severity failure;
-      res := (others => """ + logic_undef() + """);
+      res := (others => """
+        + logic_undef()
+        + """);
     else
       for I in res_type'range loop
         res (I) := la (I) {0} ra (I);
@@ -74,49 +80,63 @@ def disp_vec_binary(func, typ):
     end if;
     return res;
   end "{0}";\n"""
-    w (res.format(func, typ))
+    )
+    w(res.format(func, typ))
+
 
 def disp_non_logical_warning(func):
     return """
         assert NO_WARNING
           report "NUMERIC_STD.""{0}"": non logical value detected"
-          severity warning;""".format(func)
+          severity warning;""".format(
+        func
+    )
+
 
 def conv_bit(expr):
-    if logic == 'std':
+    if logic == "std":
         return "sl_to_x01 (" + expr + ")"
     else:
         return expr
 
+
 def extract_bit(name):
-    res = "{0}b := " + conv_bit ("{0}a (i)") + ";"
+    res = "{0}b := " + conv_bit("{0}a (i)") + ";"
     return res.format(name)
 
+
 def init_carry(func):
-    if func == '+':
+    if func == "+":
         return """
     carry := '0';"""
     else:
         return """
     carry := '1';"""
 
-def extract_extend_bit(name,typ):
+
+def extract_extend_bit(name, typ):
     res = """
        if i > {0}a'left then
           {0}b := """
-    if typ == 'UNSIGNED':
+    if typ == "UNSIGNED":
         res += "'0';"
     else:
         res += "{0} ({0}'left);"
-    res += """
+    res += (
+        """
        else
-          """ + extract_bit(name) + """
+          """
+        + extract_bit(name)
+        + """
        end if;"""
+    )
     return res.format(name)
 
+
 def disp_vec_vec_binary(func, typ):
-    "Generate vector binary function body"
-    res = """
+    """Generate vector binary function body."""
+    res = (
+        """
   function "{0}" (l, r : {1}) return {1}
   is
     constant lft : integer := MAX (l'length, r'length) - 1;
@@ -124,27 +144,33 @@ def disp_vec_vec_binary(func, typ):
     alias la : {1} (l'length - 1 downto 0) is l;
     alias ra : {1} (r'length - 1 downto 0) is r;
     variable res : res_type;
-    variable lb, rb, carry : """ + logic_type () + """;
+    variable lb, rb, carry : """
+        + logic_type()
+        + """;
   begin
     if la'left < 0 or ra'left < 0 then
        return null_{1};
     end if;"""
+    )
 
     res += init_carry(func)
 
     res += """
     for i in 0 to lft loop"""
-    res += extract_extend_bit('l', typ)
-    res += extract_extend_bit('r', typ)
-
-    if logic == 'std':
-        res += """
-       if lb = 'X' or rb = 'X' then""" + \
-       disp_non_logical_warning(func) + """
+    res += extract_extend_bit("l", typ)
+    res += extract_extend_bit("r", typ)
+
+    if logic == "std":
+        res += (
+            """
+       if lb = 'X' or rb = 'X' then"""
+            + disp_non_logical_warning(func)
+            + """
           res := (others => 'X');
           exit;
         end if;"""
-    if func == '-':
+        )
+    if func == "-":
         res += """
       rb := not rb;"""
     res += """
@@ -154,20 +180,25 @@ def disp_vec_vec_binary(func, typ):
     return res;
   end "{0}";
 """
-    w (res.format (func, typ))
+    w(res.format(func, typ))
+
 
 def declare_int_var(name, typ):
     res = """
      variable {0}1, {0}2 : {1};
-     variable {0}d : nat1;""";
+     variable {0}d : nat1;"""
     if typ == "INTEGER":
         res += """
      constant {0}msb : nat1 := boolean'pos({0} < 0);"""
     return res.format(name, typ)
 
+
 def init_int_var(name, typ):
     return """
-    {0}1 := {0};""".format(name);
+    {0}1 := {0};""".format(
+        name
+    )
+
 
 def extract_int_lsb(name, typ):
     res = """
@@ -187,7 +218,8 @@ def extract_int_lsb(name, typ):
        {0}1 := {0}2;"""
     res += """
        {0}b := nat1_to_01 ({0}d);"""
-    return res.format(name,typ)
+    return res.format(name, typ)
+
 
 def check_int_truncated(func, name, typ):
     if typ == "INTEGER":
@@ -199,92 +231,109 @@ def check_int_truncated(func, name, typ):
       assert NO_WARNING
         report "NUMERIC_STD.""{0}"": vector is truncated"
         severity warning;
-    end if;""".format(func, name, v)
+    end if;""".format(
+        func, name, v
+    )
+
 
 def create_vec_int_dict(func, left, right):
     if left in vec_types:
-        dic = {'vtype': left,
-               'itype': right,
-               'vparam': 'l',
-               'iparam': 'r'}
+        dic = {"vtype": left, "itype": right, "vparam": "l", "iparam": "r"}
     else:
-        dic = {'vtype': right,
-               'itype': left,
-               'vparam': 'r',
-               'iparam': 'l'}
-    dic.update({'ltype': left,
-                'rtype': right,
-                'func': func,
-                'logic': logic_type()})
+        dic = {"vtype": right, "itype": left, "vparam": "r", "iparam": "l"}
+    dic.update({"ltype": left, "rtype": right, "func": func, "logic": logic_type()})
     return dic
 
+
 def disp_vec_int_binary(func, left, right):
-    "Generate vector binary function body"
+    """Generate vector binary function body."""
     dic = create_vec_int_dict(func, left, right)
-    res = """
+    res = (
+        """
   function "{func}" (l : {ltype}; r : {rtype}) return {vtype}
   is
     subtype res_type is {vtype} ({vparam}'length - 1 downto 0);
-    alias {vparam}a : res_type is {vparam};""" + \
-    declare_int_var (dic["iparam"], dic["itype"]) + """
+    alias {vparam}a : res_type is {vparam};"""
+        + declare_int_var(dic["iparam"], dic["itype"])
+        + """
     variable res : res_type;
     variable lb, rb, carry : {logic};
   begin
     if res'length < 0 then
        return null_{vtype};
     end if;"""
+    )
 
     # Initialize carry.  For subtraction, use 2-complement.
     res += init_carry(func)
 
-    res += init_int_var(dic['iparam'], dic['itype']) + """
+    res += (
+        init_int_var(dic["iparam"], dic["itype"])
+        + """
     for i in res'reverse_range loop
-       """ + extract_bit(dic['vparam']) + "\n" + \
-       extract_int_lsb(dic['iparam'], dic['itype']);
-
-    if logic == 'std':
-       res += """
-       if {vparam}b = 'X' then""" + \
-    disp_non_logical_warning(func) + """
+       """
+        + extract_bit(dic["vparam"])
+        + "\n"
+        + extract_int_lsb(dic["iparam"], dic["itype"])
+    )
+
+    if logic == "std":
+        res += (
+            """
+       if {vparam}b = 'X' then"""
+            + disp_non_logical_warning(func)
+            + """
         res := (others => 'X');
         {iparam}1 := 0;
         exit;
       end if;"""
+        )
 
     # 2-complement for subtraction
-    if func == '-':
+    if func == "-":
         res += """
       rb := not rb;"""
 
-    res += """
+    res += (
+        """
       res (i) := compute_sum (carry, rb, lb);
       carry := compute_carry (carry, rb, lb);
-    end loop;""" + \
-    check_int_truncated(func, dic['iparam'], dic['itype']) + """
+    end loop;"""
+        + check_int_truncated(func, dic["iparam"], dic["itype"])
+        + """
     return res;
   end "{func}";\n"""
-    w(res.format (**dic))
+    )
+    w(res.format(**dic))
+
 
 def disp_vec_int_gcompare(func, left, right):
-    "Generate comparison function"
+    """Generate comparison function."""
     dic = create_vec_int_dict(func, left, right)
-    res = """
+    res = (
+        """
   function {func} (l : {ltype}; r : {rtype}) return compare_type
   is
     subtype res_type is {vtype} ({vparam}'length - 1 downto 0);
-    alias la : res_type is l;""" + \
-    declare_int_var (dic['iparam'], dic['itype']) + """
+    alias la : res_type is l;"""
+        + declare_int_var(dic["iparam"], dic["itype"])
+        + """
     variable lb, rb : {logic};
     variable res : compare_type;
   begin
-    res := compare_eq;""";
+    res := compare_eq;"""
+    )
 
-    res += init_int_var(dic['iparam'], dic['itype']) + """
+    res += (
+        init_int_var(dic["iparam"], dic["itype"])
+        + """
     for i in {vparam}a'reverse_range loop
-       """ + extract_bit (dic['vparam']) + \
-       extract_int_lsb("r", right)
+       """
+        + extract_bit(dic["vparam"])
+        + extract_int_lsb("r", right)
+    )
 
-    if logic == 'std':
+    if logic == "std":
         res += """
        if {vparam}b = 'X' then
          return compare_unknown;
@@ -303,8 +352,11 @@ def disp_vec_int_gcompare(func, left, right):
        res := compare_lt;
     end if;"""
     else:
-        res += """
-    if """ + conv_bit ("l (l'left)") + """ = '1' then
+        res += (
+            """
+    if """
+            + conv_bit("l (l'left)")
+            + """ = '1' then
       if r >= 0 then
          res := compare_lt;
       end if;
@@ -313,21 +365,25 @@ def disp_vec_int_gcompare(func, left, right):
          res := compare_gt;
       end if;
     end if;"""
+        )
     res += """
     return res;
   end {func};
 """
-    w(res.format (**dic))
+    w(res.format(**dic))
+
 
 def disp_vec_int_compare(func, left, right):
-    "Generate comparison function"
+    """Generate comparison function."""
     dic = create_vec_int_dict(func, left, right)
-    res = """
+    res = (
+        """
   function "{func}" (l : {ltype}; r : {rtype}) return boolean
   is
      subtype res_type is {vtype} ({vparam}'length - 1 downto 0);
-     alias {vparam}a : res_type is {vparam};""" + \
-    declare_int_var (dic['iparam'], dic['itype']) + """
+     alias {vparam}a : res_type is {vparam};"""
+        + declare_int_var(dic["iparam"], dic["itype"])
+        + """
      variable res : compare_type;
   begin
      if {vparam}'length = 0 then
@@ -338,6 +394,7 @@ def disp_vec_int_compare(func, left, right):
      end if;
 
      res := """
+    )
 
     if left == "SIGNED" or right == "SIGNED":
         res += "scompare"
@@ -347,12 +404,15 @@ def disp_vec_int_compare(func, left, right):
         res += " (l, r);"
     else:
         res += " (r, l);"
-    if logic == 'std':
-        res += """
-     if res = compare_unknown then""" + \
-    disp_non_logical_warning(func) + """
+    if logic == "std":
+        res += (
+            """
+     if res = compare_unknown then"""
+            + disp_non_logical_warning(func)
+            + """
       return false;
      end if;"""
+        )
 
     if left in vec_types:
         res += """
@@ -363,10 +423,11 @@ def disp_vec_int_compare(func, left, right):
     res += """
   end "{func}";
 """
-    w(res.format (**dic))
+    w(res.format(**dic))
+
 
 def disp_vec_vec_gcompare(func, typ):
-    "Generate comparison function"
+    """Generate comparison function."""
     res = """
   function {func} (l, r : {typ}) return compare_type
   is
@@ -376,11 +437,16 @@ def disp_vec_vec_gcompare(func, typ):
      variable lb, rb : {logic};
      variable res : compare_type;
   begin"""
-    if typ == 'SIGNED':
-        res += """
+    if typ == "SIGNED":
+        res += (
+            """
      --  Consider sign bit as S * -(2**N).
-     lb := """ + conv_bit ("la (la'left)") + """;
-     rb := """ + conv_bit ("ra (ra'left)") + """;
+     lb := """
+            + conv_bit("la (la'left)")
+            + """;
+     rb := """
+            + conv_bit("ra (ra'left)")
+            + """;
      if lb = '1' and rb = '0' then
         return compare_lt;
      elsif lb = '0' and rb = '1' then
@@ -388,18 +454,19 @@ def disp_vec_vec_gcompare(func, typ):
      else
         res := compare_eq;
      end if;"""
+        )
     else:
         res += """
      res := compare_eq;"""
-    if typ == 'SIGNED':
+    if typ == "SIGNED":
         res += """
      for i in 0 to sz - 1 loop"""
     else:
         res += """
     for i in 0 to sz loop"""
-    res += extract_extend_bit('l', typ)
-    res += extract_extend_bit('r', typ)
-    if logic == 'std':
+    res += extract_extend_bit("l", typ)
+    res += extract_extend_bit("r", typ)
+    if logic == "std":
         res += """
        if lb = 'X' or rb = 'X' then
          return compare_unknown;
@@ -415,10 +482,11 @@ def disp_vec_vec_gcompare(func, typ):
 
      return res;
   end {func};\n"""
-    w(res.format (func=func, typ=typ, logic=logic_type()))
+    w(res.format(func=func, typ=typ, logic=logic_type()))
+
 
 def disp_vec_vec_compare(func, typ):
-    "Generate comparison function"
+    """Generate comparison function."""
     res = """
   function "{func}" (l, r : {typ}) return boolean
   is
@@ -438,21 +506,26 @@ def disp_vec_vec_compare(func, typ):
         res += "ucompare"
     res += """ (l, r);"""
 
-    if logic == 'std':
-        res += """
-     if res = compare_unknown then""" + \
-    disp_non_logical_warning(func) + """
+    if logic == "std":
+        res += (
+            """
+     if res = compare_unknown then"""
+            + disp_non_logical_warning(func)
+            + """
        return false;
      end if;"""
+        )
 
     res += """
      return res {func} compare_eq;
   end "{func}";\n"""
-    w(res.format (func=func, typ=typ))
+    w(res.format(func=func, typ=typ))
+
 
 def disp_vec_not(typ):
-    "Generate vector binary function body"
-    w("""
+    """Generate vector binary function body."""
+    w(
+        """
   function "not" (l : {0}) return {0}
   is
     subtype res_type is {0} (l'length - 1 downto 0);
@@ -463,7 +536,11 @@ def disp_vec_not(typ):
       res (I) := not la (I);
     end loop;
     return res;
-  end "not";\n""".format(typ))
+  end "not";\n""".format(
+            typ
+        )
+    )
+
 
 def disp_resize(typ):
     res = """
@@ -480,7 +557,7 @@ def disp_resize(typ):
      end if;
      if arg1'length > new_size then
         --  Reduction."""
-    if typ == 'SIGNED':
+    if typ == "SIGNED":
         res += """
         res (res'left) := arg1 (arg1'left);
         res (res'left - 1 downto 0) := arg1 (res'left - 1 downto 0);"""
@@ -491,7 +568,7 @@ def disp_resize(typ):
      else
         --  Expansion
         res (arg1'range) := arg1;"""
-    if typ == 'SIGNED':
+    if typ == "SIGNED":
         res += """
         res (res'left downto arg1'length) := (others => arg1 (arg1'left));"""
     res += """
@@ -500,8 +577,9 @@ def disp_resize(typ):
   end resize;\n"""
     w(res.format(typ))
 
+
 def gen_shift(dir, inv):
-    if (dir == 'left') ^ inv:
+    if (dir == "left") ^ inv:
         res = """
        res (res'left downto {opp}count) := arg1 (arg1'left {sub} count downto 0);"""
     else:
@@ -512,6 +590,7 @@ def gen_shift(dir, inv):
     else:
         return res.format(opp="", sub="-")
 
+
 def disp_shift_op(name, typ, dir):
     res = """
   function {0} (ARG : {1}; COUNT: INTEGER) return {1}
@@ -534,6 +613,7 @@ def disp_shift_op(name, typ, dir):
   end {0};\n"""
     w(res.format(name, typ))
 
+
 def disp_shift(name, typ, dir):
     res = """
   function {0} (ARG : {1}; COUNT: NATURAL) return {1}
@@ -541,7 +621,7 @@ def disp_shift(name, typ, dir):
      subtype res_type is {1} (ARG'length - 1 downto 0);
      alias arg1 : res_type is arg;
      variable res : res_type := (others => """
-    if typ == 'SIGNED' and dir == 'right':
+    if typ == "SIGNED" and dir == "right":
         res += "arg1 (arg1'left)"
     else:
         res += "'0'"
@@ -558,14 +638,16 @@ def disp_shift(name, typ, dir):
   end {0};\n"""
     w(res.format(name, typ))
 
+
 def disp_rotate(name, typ, dir):
-    if 'rotate' in name:
-        count_type = 'natural'
-        op = 'rem'
+    if "rotate" in name:
+        count_type = "natural"
+        op = "rem"
     else:
-        count_type = 'integer'
-        op = 'mod'
-    res = """
+        count_type = "integer"
+        op = "mod"
+    res = (
+        """
   function {0} (ARG : {1}; COUNT: {2}) return {1}
   is
      subtype res_type is {1} (ARG'length - 1 downto 0);
@@ -576,8 +658,11 @@ def disp_rotate(name, typ, dir):
      if res'length = 0 then
         return null_{1};
      end if;
-     cnt := count """ + op + " res'length;"
-    if dir == 'left':
+     cnt := count """
+        + op
+        + " res'length;"
+    )
+    if dir == "left":
         res += """
      res (res'left downto cnt) := arg1 (res'left - cnt downto 0);
      res (cnt - 1 downto 0) := arg1 (res'left downto res'left - cnt + 1);"""
@@ -590,24 +675,32 @@ def disp_rotate(name, typ, dir):
   end {0};\n"""
     w(res.format(name, typ, count_type))
 
+
 def disp_vec_vec_mul(func, typ):
-    res = """
+    res = (
+        """
   function "{0}" (L, R : {1}) return {1}
   is
      alias la : {1} (L'Length - 1 downto 0) is l;
      alias ra : {1} (R'Length - 1 downto 0) is r;
      variable res : {1} (L'length + R'Length -1 downto 0) := (others => '0');
-     variable rb, lb, vb, carry : """ + logic_type() + """;
+     variable rb, lb, vb, carry : """
+        + logic_type()
+        + """;
   begin
      if la'length = 0 or ra'length = 0 then
         return null_{1};
      end if;
      --  Shift and add L.
      for i in natural range 0 to ra'left """
-    if typ == 'SIGNED':
+    )
+    if typ == "SIGNED":
         res += "- 1 "
-    res += """loop
-       """ + extract_bit ('r') + """
+    res += (
+        """loop
+       """
+        + extract_bit("r")
+        + """
        if rb = '1' then
           --  Compute res := res + shift_left (l, i).
           carry := '0';
@@ -617,7 +710,8 @@ def disp_vec_vec_mul(func, typ):
             res (i + j) := compute_sum (carry, vb, lb);
             carry := compute_carry (carry, vb, lb);
           end loop;"""
-    if typ == 'UNSIGNED':
+    )
+    if typ == "UNSIGNED":
         res += """
           --  Propagate carry.
           for j in i + la'length to res'left loop
@@ -635,14 +729,15 @@ def disp_vec_vec_mul(func, typ):
              res (j) := compute_sum (carry, vb, lb);
              carry := compute_carry (carry, vb, lb);
           end loop;"""
-    if logic == 'std':
+    if logic == "std":
         res += """
-       elsif rb = 'X' then""" + \
-        disp_non_logical_warning (func)
+       elsif rb = 'X' then""" + disp_non_logical_warning(
+            func
+        )
     res += """
        end if;
      end loop;"""
-    if typ == 'SIGNED':
+    if typ == "SIGNED":
         res += """
      if ra (ra'left) = '1' then
         --  R is a negative number.  It is considered as:
@@ -662,7 +757,8 @@ def disp_vec_vec_mul(func, typ):
     res += """
      return res;
   end "{0}";\n"""
-    w(res.format(func,typ))
+    w(res.format(func, typ))
+
 
 def disp_vec_int_mul(left, right):
     res = """
@@ -675,7 +771,8 @@ def disp_vec_int_mul(left, right):
      end if;
      return l * to_{0} (r, size);
   end "*";\n"""
-    w (res.format(left,right))
+    w(res.format(left, right))
+
 
 def disp_int_vec_mul(left, right):
     res = """
@@ -688,27 +785,35 @@ def disp_int_vec_mul(left, right):
      end if;
      return r * to_{1} (l, size);
   end "*";\n"""
-    w (res.format(left,right))
+    w(res.format(left, right))
+
 
 def disp_neg(func):
-    res = """
+    res = (
+        """
   function "{func}" (ARG : SIGNED) return SIGNED
   is
      subtype arg_type is SIGNED (ARG'length - 1 downto 0);
      alias arga : arg_type is arg;
      variable res : arg_type;
-     variable carry, a : """ + logic_type() + """;
+     variable carry, a : """
+        + logic_type()
+        + """;
   begin
      if arga'length = 0 then
         return null_signed;
      end if;"""
-    if logic == 'std':
-        res += """
-     if has_0x (arga) = 'X' then""" + \
-       disp_non_logical_warning("-") + """
+    )
+    if logic == "std":
+        res += (
+            """
+     if has_0x (arga) = 'X' then"""
+            + disp_non_logical_warning("-")
+            + """
        return arg_type'(others => 'X');
      end if;"""
-    if func == 'abs':
+        )
+    if func == "abs":
         res += """
      if arga (arga'left) = '0' then
         return arga;
@@ -724,6 +829,7 @@ def disp_neg(func):
   end "{func}";\n"""
     w(res.format(func=func))
 
+
 def disp_has_0x(typ):
     res = """
   function has_0x (a : {0}) return {1}
@@ -731,8 +837,8 @@ def disp_has_0x(typ):
      variable res : {1} := '0';
   begin
      for i in a'range loop"""
-    if logic == 'std':
-      res += """
+    if logic == "std":
+        res += """
       if a (i) = 'X' then
          return 'X';
       end if;"""
@@ -743,8 +849,10 @@ def disp_has_0x(typ):
   end has_0x;\n"""
     w(res.format(typ, logic_type()))
 
+
 def disp_size():
-    w("""
+    w(
+        """
   function size_unsigned (n : natural) return natural
   is
      --  At least one bit (even for 0).
@@ -756,9 +864,11 @@ def disp_size():
         n1 := n1 / 2;
      end loop;
      return res;
-  end size_unsigned;\n""")
+  end size_unsigned;\n"""
+    )
 
-    w("""
+    w(
+        """
   function size_signed (n : integer) return natural
   is
      variable res : natural := 1;
@@ -775,10 +885,13 @@ def disp_size():
         n1 := n1 / 2;
      end loop;
      return res;
-  end size_signed;\n""")
+  end size_signed;\n"""
+    )
+
 
 def disp_divmod():
-    w("""
+    w(
+        """
   --  All index range are normalized (N downto 0).
   --  NUM and QUOT have the same range.
   --  DEM and REMAIN have the same range.
@@ -788,7 +901,9 @@ def disp_divmod():
      --  An extra bit is needed so that it is always possible that DEM >= REG.
      variable reg : unsigned (dem'left + 1 downto 0) := (others => '0');
      variable sub : unsigned (dem'range) := (others => '0');
-     variable carry, d : """ + logic_type () + """;
+     variable carry, d : """
+        + logic_type()
+        + """;
   begin
      for i in num'range loop
         --  Shift to add a new bit from NUM to REG.
@@ -816,10 +931,13 @@ def disp_divmod():
      end loop;
      remain := reg (dem'range);
   end divmod;
-""")
+"""
+    )
+
 
 def disp_vec_vec_udiv(func):
-    res = """
+    res = (
+        """
   function "{func}" (L, R : UNSIGNED) return UNSIGNED
   is
      subtype l_type is UNSIGNED (L'length - 1 downto 0);
@@ -828,32 +946,39 @@ def disp_vec_vec_udiv(func):
      alias ra : r_type is r;
      variable quot : l_type;
      variable rema : r_type;
-     variable r0 : """ + logic_type() + """ := has_0x (r);
+     variable r0 : """
+        + logic_type()
+        + """ := has_0x (r);
   begin
      if la'length = 0 or ra'length = 0 then
         return null_unsigned;
      end if;"""
-    if logic == 'std':
-        res += """
-     if has_0x (l) = 'X' or r0 = 'X' then""" + \
-        disp_non_logical_warning ('/') + """
+    )
+    if logic == "std":
+        res += (
+            """
+     if has_0x (l) = 'X' or r0 = 'X' then"""
+            + disp_non_logical_warning("/")
+            + """
         return l_type'(others => 'X');
      end if;"""
+        )
     res += """
      assert r0 /= '0'
         report "NUMERIC_STD.""{func}"": division by 0"
         severity error;
      divmod (la, ra, quot, rema);"""
-    if func == '/':
-       res += """
+    if func == "/":
+        res += """
      return quot;"""
     else:
-       res += """
+        res += """
      return rema;"""
     res += """
   end "{func}";\n"""
     w(res.format(func=func))
 
+
 def disp_vec_int_udiv(func):
     res = """
   function "{func}" (L : UNSIGNED; R : NATURAL) return UNSIGNED
@@ -863,7 +988,7 @@ def disp_vec_int_udiv(func):
      if l'length = 0 then
         return null_unsigned;
      end if;"""
-    if func in ['mod', 'rem']:
+    if func in ["mod", "rem"]:
         res += """
      return resize (l {func} to_unsigned (r, r_size), l'length);"""
     else:
@@ -881,7 +1006,7 @@ def disp_vec_int_udiv(func):
      if r'length = 0 then
         return null_unsigned;
      end if;"""
-    if func == '/':
+    if func == "/":
         res += """
      return resize (to_unsigned (l, l_size) {func} r, r'length);"""
     else:
@@ -891,8 +1016,10 @@ def disp_vec_int_udiv(func):
   end "{func}";\n"""
     w(res.format(func=func))
 
+
 def disp_vec_vec_sdiv(func):
-    res = """
+    res = (
+        """
   function "{func}" (L, R : SIGNED) return SIGNED
   is
      subtype l_type is SIGNED (L'length - 1 downto 0);
@@ -905,17 +1032,23 @@ def disp_vec_vec_sdiv(func):
      variable ru : r_utype;
      variable quot : l_utype;
      variable rema : r_utype;
-     variable r0 : """ + logic_type() + """ := has_0x (r);
+     variable r0 : """
+        + logic_type()
+        + """ := has_0x (r);
   begin
      if la'length = 0 or ra'length = 0 then
         return null_signed;
      end if;"""
-    if logic == 'std':
-        res += """
-     if has_0x (l) = 'X' or r0 = 'X' then""" + \
-        disp_non_logical_warning (func) + """
+    )
+    if logic == "std":
+        res += (
+            """
+     if has_0x (l) = 'X' or r0 = 'X' then"""
+            + disp_non_logical_warning(func)
+            + """
         return l_type'(others => 'X');
      end if;"""
+        )
     res += """
      assert r0 /= '0'
         report "NUMERIC_STD.""{func}"": division by 0"
@@ -932,14 +1065,14 @@ def disp_vec_vec_sdiv(func):
         ru := unsigned (ra);
      end if;
      divmod (lu, ru, quot, rema);"""
-    if func == '/':
+    if func == "/":
         res += """
      if (ra (ra'left) xor la (la'left)) = '1' then
        return -signed (quot);
      else
        return signed (quot);
      end if;"""
-    elif func == 'rem':
+    elif func == "rem":
         res += """
      --  Result of rem has the sign of the dividend.
      if la (la'left) = '1' then
@@ -947,7 +1080,7 @@ def disp_vec_vec_sdiv(func):
      else
        return signed (rema);
      end if;"""
-    elif func == 'mod':
+    elif func == "mod":
         res += """
      --  Result of mod has the sign of the divisor.
      if rema = r_utype'(others => '0') then
@@ -972,6 +1105,7 @@ def disp_vec_vec_sdiv(func):
   end "{func}";\n"""
     w(res.format(func=func))
 
+
 def disp_vec_int_sdiv(func):
     res = """
   function "{func}" (L : SIGNED; R : INTEGER) return SIGNED
@@ -981,11 +1115,11 @@ def disp_vec_int_sdiv(func):
      if l'length = 0 then
         return null_signed;
      end if;"""
-    if func == '/':
-         res += """
+    if func == "/":
+        res += """
      return l {func} to_signed (r, r_size);"""
     else:
-         res += """
+        res += """
      return resize (l {func} to_signed (r, r_size), l'length);"""
     res += """
   end "{func}";\n"""
@@ -999,7 +1133,7 @@ def disp_vec_int_sdiv(func):
      if r'length = 0 then
         return null_signed;
      end if;"""
-    if func == '/':
+    if func == "/":
         res += """
      return resize (to_signed (l, max (l_size, r'length)) {func} r, r'length);"""
     else:
@@ -1009,8 +1143,9 @@ def disp_vec_int_sdiv(func):
   end "{func}";\n"""
     w(res.format(func=func))
 
+
 def disp_all_log_funcs():
-    "Generate all function bodies for logic operators"
+    """Generate all function bodies for logic operators."""
     for t in vec_types:
         disp_resize(t)
     for v in vec_types:
@@ -1030,15 +1165,16 @@ def disp_all_log_funcs():
         disp_vec_int_compare(f, "SIGNED", "INTEGER")
         disp_vec_int_compare(f, "INTEGER", "SIGNED")
     for t in vec_types:
-        for d in ['left', 'right']:
-            disp_shift('shift_' + d, t, d);
-        for d in ['left', 'right']:
-            disp_rotate('rotate_' + d, t, d);
+        for d in ["left", "right"]:
+            disp_shift("shift_" + d, t, d)
+        for d in ["left", "right"]:
+            disp_rotate("rotate_" + d, t, d)
         if v93:
-            disp_shift_op('"sll"', t, 'left')
-            disp_shift_op('"srl"', t, 'right')
-            disp_rotate('"rol"', t, 'left')
-            disp_rotate('"ror"', t, 'right')
+            disp_shift_op('"sll"', t, "left")
+            disp_shift_op('"srl"', t, "right")
+            disp_rotate('"rol"', t, "left")
+            disp_rotate('"ror"', t, "right")
+
 
 def disp_match(typ):
     res = """
@@ -1070,75 +1206,83 @@ def disp_match(typ):
 
 
 def disp_all_match_funcs():
-    disp_match('std_ulogic_vector');
-    disp_match('std_logic_vector');
-    disp_match('UNSIGNED');
-    disp_match('SIGNED');
+    disp_match("std_ulogic_vector")
+    disp_match("std_logic_vector")
+    disp_match("UNSIGNED")
+    disp_match("SIGNED")
+
 
 def disp_all_arith_funcs():
-    "Generate all function bodies for logic operators"
-    for op in ['+', '-']:
+    """Generate all function bodies for logic operators."""
+    for op in ["+", "-"]:
         disp_vec_vec_binary(op, "UNSIGNED")
         disp_vec_vec_binary(op, "SIGNED")
         disp_vec_int_binary(op, "UNSIGNED", "NATURAL")
         disp_vec_int_binary(op, "NATURAL", "UNSIGNED")
         disp_vec_int_binary(op, "SIGNED", "INTEGER")
         disp_vec_int_binary(op, "INTEGER", "SIGNED")
-    disp_vec_vec_mul('*', 'UNSIGNED')
-    disp_vec_vec_mul('*', 'SIGNED')
-    disp_vec_int_mul('UNSIGNED', 'NATURAL')
-    disp_vec_int_mul('SIGNED', 'INTEGER')
-    disp_int_vec_mul('NATURAL', 'UNSIGNED')
-    disp_int_vec_mul('INTEGER', 'SIGNED')
-    disp_has_0x('UNSIGNED')
+    disp_vec_vec_mul("*", "UNSIGNED")
+    disp_vec_vec_mul("*", "SIGNED")
+    disp_vec_int_mul("UNSIGNED", "NATURAL")
+    disp_vec_int_mul("SIGNED", "INTEGER")
+    disp_int_vec_mul("NATURAL", "UNSIGNED")
+    disp_int_vec_mul("INTEGER", "SIGNED")
+    disp_has_0x("UNSIGNED")
     disp_divmod()
     disp_size()
-    disp_vec_vec_udiv('/')
-    disp_vec_int_udiv('/')
-    disp_vec_vec_udiv('rem')
-    disp_vec_int_udiv('rem')
-    disp_vec_vec_udiv('mod')
-    disp_vec_int_udiv('mod')
-    disp_has_0x('SIGNED')
+    disp_vec_vec_udiv("/")
+    disp_vec_int_udiv("/")
+    disp_vec_vec_udiv("rem")
+    disp_vec_int_udiv("rem")
+    disp_vec_vec_udiv("mod")
+    disp_vec_int_udiv("mod")
+    disp_has_0x("SIGNED")
     disp_neg("-")
     disp_neg("abs")
-    disp_vec_vec_sdiv('/')
-    disp_vec_int_sdiv('/')
-    disp_vec_vec_sdiv('rem')
-    disp_vec_int_sdiv('rem')
-    disp_vec_vec_sdiv('mod')
-    disp_vec_int_sdiv('mod')
+    disp_vec_vec_sdiv("/")
+    disp_vec_int_sdiv("/")
+    disp_vec_vec_sdiv("rem")
+    disp_vec_int_sdiv("rem")
+    disp_vec_vec_sdiv("mod")
+    disp_vec_int_sdiv("mod")
+
 
 # Patterns to replace
-pats = {'  @LOG\n' : disp_all_log_funcs,
-        '  @ARITH\n' : disp_all_arith_funcs,
-        '  @MATCH\n' : disp_all_match_funcs }
+pats = {
+    "  @LOG\n": disp_all_log_funcs,
+    "  @ARITH\n": disp_all_arith_funcs,
+    "  @MATCH\n": disp_all_match_funcs,
+}
+
+spec_file = "numeric_std.vhdl"
+# proto_file='numeric_std-body.proto'
 
-spec_file='numeric_std.vhdl'
-#proto_file='numeric_std-body.proto'
 
 def gen_body(proto_file):
-    w('--  This -*- vhdl -*- file was generated from ' + proto_file + '\n')
+    w("--  This -*- vhdl -*- file was generated from " + proto_file + "\n")
     for line in open(proto_file):
         if line in pats:
             pats[line]()
             continue
         w(line)
 
+
 # Copy spec
 for log in logics:
-    for std in ['87', '93']:
-        out=open('v' + std + '/numeric_' + log + '.vhdl', 'w')
-        for line in open('numeric_' + log + '.proto'):
-            if line == '  @COMMON\n':
-                for lcom in open('numeric_common.proto'):
-                    if lcom[0:2] == '--':
+    for std in ["87", "93"]:
+        out = open("v" + std + "/numeric_" + log + ".vhdl", "w")
+        for line in open("numeric_" + log + ".proto"):
+            if line == "  @COMMON\n":
+                for lcom in open("numeric_common.proto"):
+                    if lcom[0:2] == "--":
                         pass
-                    elif std == '87' and ('"xnor"' in lcom
-                                          or '"sll"' in lcom
-                                          or '"srl"' in lcom
-                                          or '"rol"' in lcom
-                                          or '"ror"' in lcom):
+                    elif std == "87" and (
+                        '"xnor"' in lcom
+                        or '"sll"' in lcom
+                        or '"srl"' in lcom
+                        or '"rol"' in lcom
+                        or '"ror"' in lcom
+                    ):
                         w("--" + lcom[2:])
                     else:
                         w(lcom)
@@ -1147,17 +1291,17 @@ for log in logics:
         out.close()
 
 # Generate bodies
-v93=False
+v93 = False
 for l in logics:
     logic = l
-    out=open('v87/numeric_{0}-body.vhdl'.format(l), 'w')
-    gen_body('numeric_{0}-body.proto'.format(l))
+    out = open("v87/numeric_{0}-body.vhdl".format(l), "w")
+    gen_body("numeric_{0}-body.proto".format(l))
     out.close()
 
-v93=True
+v93 = True
 binary_funcs.append("xnor")
 for l in logics:
     logic = l
-    out=open('v93/numeric_{0}-body.vhdl'.format(l), 'w')
-    gen_body('numeric_{0}-body.proto'.format(l))
+    out = open("v93/numeric_{0}-body.vhdl".format(l), "w")
+    gen_body("numeric_{0}-body.proto".format(l))
     out.close()
diff --git a/pyGHDL/dom/NonStandard.py b/pyGHDL/dom/NonStandard.py
index 9010e392b..63a35dc7f 100644
--- a/pyGHDL/dom/NonStandard.py
+++ b/pyGHDL/dom/NonStandard.py
@@ -81,7 +81,6 @@ class Design(VHDLModel_Design):
 
     def __ghdl_init(self):
         """Initialization: set options and then load libraries."""
-
         # Initialize libghdl
         libghdl_finalize()
         libghdl_initialize()
diff --git a/pyGHDL/dom/_Utils.py b/pyGHDL/dom/_Utils.py
index 0e0cbc95b..e75c5f36a 100644
--- a/pyGHDL/dom/_Utils.py
+++ b/pyGHDL/dom/_Utils.py
@@ -61,7 +61,7 @@ def GetIirKindOfNode(node: Iir) -> nodes.Iir_Kind:
 
 @export
 def GetNameOfNode(node: Iir) -> str:
-    """Return the python string from node :obj:`node` identifier"""
+    """Return the python string from node :obj:`node` identifier."""
     identifier = nodes.Get_Identifier(node)
     return name_table.Get_Name_Ptr(identifier)
 
diff --git a/pyGHDL/libghdl/__init__.py b/pyGHDL/libghdl/__init__.py
index 1477d9361..0d3c75fa1 100644
--- a/pyGHDL/libghdl/__init__.py
+++ b/pyGHDL/libghdl/__init__.py
@@ -52,7 +52,7 @@ class LibGHDLException(GHDLBaseException):
 
 
 def _get_libghdl_name() -> Path:
-    """Get the name of the libghdl library (with version and extension)"""
+    """Get the name of the libghdl library (with version and extension)."""
     ver = __version__.replace("-", "_").replace(".", "_")
     ext = {"win32": "dll", "cygwin": "dll", "darwin": "dylib"}.get(sys.platform, "so")
     return Path("libghdl-{version}.{ext}".format(version=ver, ext=ext))
diff --git a/pyGHDL/libghdl/errorout.py b/pyGHDL/libghdl/errorout.py
index a4f034d46..94143b29e 100644
--- a/pyGHDL/libghdl/errorout.py
+++ b/pyGHDL/libghdl/errorout.py
@@ -5,9 +5,6 @@ from enum import IntEnum, unique
 from pydecor import export
 
 from pyGHDL.libghdl._decorator import BindToLibGHDL
-from enum import IntEnum, unique
-
-from pyGHDL.libghdl import libghdl
 
 
 @export
diff --git a/pyGHDL/libghdl/std_names.py b/pyGHDL/libghdl/std_names.py
index 256a1c425..b9bdb95d3 100644
--- a/pyGHDL/libghdl/std_names.py
+++ b/pyGHDL/libghdl/std_names.py
@@ -4,8 +4,6 @@
 from enum import IntEnum, unique
 from pydecor import export
 
-from pyGHDL.libghdl._decorator import BindToLibGHDL
-
 
 @export
 class Name:
diff --git a/pyGHDL/libghdl/utils.py b/pyGHDL/libghdl/utils.py
index e964f3ce3..98e350e03 100644
--- a/pyGHDL/libghdl/utils.py
+++ b/pyGHDL/libghdl/utils.py
@@ -206,7 +206,6 @@ def declarations_iter(n) -> Generator[Any, None, None]:
                 yield n1
                 # Handle nested declarations: record elements, physical units,
                 # enumeration literals...
-                typ = nodes.Get_Type_Definition(n1)
                 for n2 in declarations_iter(n1):
                     yield n2
             else:
diff --git a/pyGHDL/libghdl/vhdl/elocations.py b/pyGHDL/libghdl/vhdl/elocations.py
index c2cda3940..dd3600ecf 100644
--- a/pyGHDL/libghdl/vhdl/elocations.py
+++ b/pyGHDL/libghdl/vhdl/elocations.py
@@ -1,10 +1,8 @@
 # Auto generated Python source file from Ada sources
 # Call 'make' in 'src/vhdl' to regenerate:
 #
-from enum import IntEnum, unique
 from pydecor import export
 
-from pyGHDL.libghdl._decorator import BindToLibGHDL
 from pyGHDL.libghdl import libghdl
 
 
diff --git a/pyGHDL/libghdl/vhdl/nodes.py b/pyGHDL/libghdl/vhdl/nodes.py
index 8f4648790..1a4cf043f 100644
--- a/pyGHDL/libghdl/vhdl/nodes.py
+++ b/pyGHDL/libghdl/vhdl/nodes.py
@@ -5,6 +5,7 @@ from enum import IntEnum, unique
 from pydecor import export
 
 from pyGHDL.libghdl._decorator import BindToLibGHDL
+
 from typing import TypeVar
 from ctypes import c_int32
 from pyGHDL.libghdl import libghdl
diff --git a/pyGHDL/libghdl/vhdl/nodes_meta.py b/pyGHDL/libghdl/vhdl/nodes_meta.py
index 08724ccdf..0ad2b247e 100644
--- a/pyGHDL/libghdl/vhdl/nodes_meta.py
+++ b/pyGHDL/libghdl/vhdl/nodes_meta.py
@@ -5,6 +5,7 @@ from enum import IntEnum, unique
 from pydecor import export
 
 from pyGHDL.libghdl._decorator import BindToLibGHDL
+
 from pyGHDL.libghdl import libghdl
 from pyGHDL.libghdl._types import IirKind
 
diff --git a/pyGHDL/lsp/lsp.py b/pyGHDL/lsp/lsp.py
index a2598f186..43b8c47c8 100644
--- a/pyGHDL/lsp/lsp.py
+++ b/pyGHDL/lsp/lsp.py
@@ -117,7 +117,7 @@ class LanguageProtocolServer(object):
                 params = {}
             try:
                 response = fmethod(**params)
-            except Exception as e:
+            except Exception:
                 log.exception(
                     "Caught exception while handling %s with params %s:", method, params
                 )
diff --git a/pyGHDL/lsp/workspace.py b/pyGHDL/lsp/workspace.py
index bef20a872..cb392be9b 100644
--- a/pyGHDL/lsp/workspace.py
+++ b/pyGHDL/lsp/workspace.py
@@ -4,7 +4,7 @@ import json
 from ctypes import byref
 import pyGHDL.libghdl as libghdl
 import pyGHDL.libghdl.errorout_memory as errorout_memory
-import pyGHDL.libghdl.flags
+import pyGHDL.libghdl.flags as flags
 import pyGHDL.libghdl.errorout as errorout
 import pyGHDL.libghdl.files_map as files_map
 import pyGHDL.libghdl.libraries as libraries
@@ -12,7 +12,7 @@ import pyGHDL.libghdl.name_table as name_table
 import pyGHDL.libghdl.vhdl.nodes as nodes
 import pyGHDL.libghdl.vhdl.lists as lists
 import pyGHDL.libghdl.vhdl.std_package as std_package
-import pyGHDL.libghdl.vhdl.parse
+import pyGHDL.libghdl.vhdl.parse as parse
 import pyGHDL.libghdl.vhdl.sem_lib as sem_lib
 import pyGHDL.libghdl.utils as pyutils
 
@@ -44,15 +44,15 @@ class Workspace(object):
         self._prj = {}
         self._last_linted_doc = None
         errorout_memory.Install_Handler()
-        libghdl.flags.Flag_Elocations.value = True
-        # libghdl.Flags.Verbose.value = True
+        flags.Flag_Elocations.value = True
+        # flags.Verbose.value = True
         # We do analysis even in case of errors.
-        libghdl.vhdl.parse.Flag_Parse_Parenthesis.value = True
+        parse.Flag_Parse_Parenthesis.value = True
         # Force analysis to get more feedback + navigation even in case
         # of errors.
-        libghdl.flags.Flag_Force_Analysis.value = True
+        flags.Flag_Force_Analysis.value = True
         # Do not consider analysis order issues.
-        libghdl.flags.Flag_Elaborate_With_Outdated.value = True
+        flags.Flag_Elaborate_With_Outdated.value = True
         libghdl.errorout.Enable_Warning(errorout.Msgid.Warnid_Unused, True)
         self.read_project()
         self.set_options_from_project()
diff --git a/scripts/pnodespy.py b/scripts/pnodespy.py
index dabe94446..f443d36c5 100755
--- a/scripts/pnodespy.py
+++ b/scripts/pnodespy.py
@@ -30,16 +30,15 @@ def print_enum(name, vals):
         print("    {0} = {1}".format(k, n))
 
 
-def print_file_header():
+def print_file_header(includeIntEnumUnique=True, includeBindToLibGHDL=True):
     print(dedent("""\
             # Auto generated Python source file from Ada sources
             # Call 'make' in 'src/vhdl' to regenerate:
             #
-            from enum import IntEnum, unique
-            from pydecor import export
-
-            from pyGHDL.libghdl._decorator import BindToLibGHDL
-        """), end=''
+        """) + "{sysImports}from pydecor import export\n{moduleImports}".format(
+            sysImports = "from enum import IntEnum, unique\n" if includeIntEnumUnique else "",
+            moduleImports = "\nfrom pyGHDL.libghdl._decorator import BindToLibGHDL\n" if includeBindToLibGHDL else "",
+        )
     )
 
 
@@ -97,7 +96,7 @@ def do_iirs_subprg():
 
 def do_libghdl_elocations():
     classname = "vhdl__elocations"
-    print_file_header()
+    print_file_header(includeIntEnumUnique=False, includeBindToLibGHDL=False)
     print("from pyGHDL.libghdl import libghdl")
     print()
     for k in pnodes.funcs:
@@ -147,7 +146,7 @@ def do_class_fields():
 
 
 def read_enum(filename, type_name, prefix, class_name, g=lambda m: m.group(1)):
-    """Read an enumeration declaration from :param filename:"""
+    """Read an enumeration declaration from :param filename:."""
     pat_decl = re.compile(r"   type {0} is$".format(type_name))
     pat_enum = re.compile(r"      {0}(\w+),?( *-- .*)?$".format(prefix))
     pat_comment = re.compile(r" *-- .*$")
@@ -183,7 +182,7 @@ def read_enum(filename, type_name, prefix, class_name, g=lambda m: m.group(1)):
 
 
 def read_spec_enum(type_name, prefix, class_name):
-    """Read an enumeration declaration from iirs.ads"""
+    """Read an enumeration declaration from iirs.ads."""
     read_enum(pnodes.kind_file, type_name, prefix, class_name)
 
 
@@ -335,7 +334,7 @@ def do_libghdl_names():
             val_max = max(val_max, val)
             dict[name_def] = val
             res.append((name_def, val))
-    print_file_header()
+    print_file_header(includeBindToLibGHDL=False)
     print(dedent("""
 
         @export
@@ -358,10 +357,6 @@ def do_libghdl_tokens():
 def do_libghdl_errorout():
     print_file_header()
     print(dedent("""\
-        from enum import IntEnum, unique
-
-        from pyGHDL.libghdl import libghdl
-
         @export
         @BindToLibGHDL("errorout__enable_warning")
         def Enable_Warning(Id: int, Enable: bool) -> None:
diff --git a/testsuite/gna/issue43/run.py b/testsuite/gna/issue43/run.py
index f1cb5ec01..d37c1cbaa 100644
--- a/testsuite/gna/issue43/run.py
+++ b/testsuite/gna/issue43/run.py
@@ -1,14 +1,6 @@
-import os

-import sys

-from string import join

 from vunit import VUnit

 

-

-

-# Create VUnit instance by parsing command line arguments

 vu = VUnit.from_argv()

 vu.add_com()

-lib = vu.add_library("lib")

-lib.add_source_files("*.vhd")

-

-vu.main()
\ No newline at end of file
+vu.add_library("lib").add_source_files("*.vhd")

+vu.main()

diff --git a/testsuite/pyunit/libghdl/Initialize.py b/testsuite/pyunit/libghdl/Initialize.py
index 4d5bb521a..369faee07 100644
--- a/testsuite/pyunit/libghdl/Initialize.py
+++ b/testsuite/pyunit/libghdl/Initialize.py
@@ -18,11 +18,11 @@ class Instantiate(TestCase):
 
 	@staticmethod
 	def getIdentifier(node):
-		"""Return the Python string from node :obj:`node` identifier"""
+		"""Return the Python string from node :obj:`node` identifier."""
 		return name_table.Get_Name_Ptr(nodes.Get_Identifier(node))
 
 	def test_InitializeGHDL(self) -> None:
-		"""Initialization: set options and then load libaries"""
+		"""Initialization: set options and then load libaries."""
 		libghdl.initialize()
 
 		# Print error messages on the console.
diff --git a/testsuite/pyunit/lsp/LanguageServer.py b/testsuite/pyunit/lsp/LanguageServer.py
index 36ee6da2a..c1bcf1898 100644
--- a/testsuite/pyunit/lsp/LanguageServer.py
+++ b/testsuite/pyunit/lsp/LanguageServer.py
@@ -1,5 +1,4 @@
 import os
-import string
 from sys import executable
 from io import BytesIO
 from json import load as json_load, loads as json_loads, dumps as json_dumps
@@ -7,7 +6,7 @@ from pathlib import Path
 from urllib.parse import quote
 from subprocess import run as subprocess_run, PIPE
 from typing import Optional
-from unittest import TestCase, skip
+from unittest import TestCase
 
 from pyGHDL.lsp.lsp import LanguageProtocolServer, LSPConn