6 files changed, 17 insertions, 16 deletions
diff --git a/cryptography/hazmat/backends/commoncrypto/backend.py b/cryptography/hazmat/backends/commoncrypto/backend.py
index 53228b31..dc0534ee 100644
--- a/cryptography/hazmat/backends/commoncrypto/backend.py
+++ b/cryptography/hazmat/backends/commoncrypto/backend.py
@@ -17,18 +17,18 @@ from collections import namedtuple
 
 from cryptography import utils
 from cryptography.exceptions import (
-    InvalidTag, InternalError, UnsupportedCipher, UnsupportedHash
+    InternalError, InvalidTag, UnsupportedCipher, UnsupportedHash
 )
 from cryptography.hazmat.backends.interfaces import (
-    HashBackend, HMACBackend, CipherBackend, PBKDF2HMACBackend
+    CipherBackend, HMACBackend, HashBackend, PBKDF2HMACBackend
 )
 from cryptography.hazmat.bindings.commoncrypto.binding import Binding
-from cryptography.hazmat.primitives import interfaces, constant_time
+from cryptography.hazmat.primitives import constant_time, interfaces
 from cryptography.hazmat.primitives.ciphers.algorithms import (
-    AES, Blowfish, TripleDES, ARC4, CAST5
+    AES, ARC4, Blowfish, CAST5, TripleDES
 )
 from cryptography.hazmat.primitives.ciphers.modes import (
-    CBC, CTR, ECB, OFB, CFB, GCM
+    CBC, CFB, CTR, ECB, GCM, OFB
 )
 
 
diff --git a/cryptography/hazmat/backends/multibackend.py b/cryptography/hazmat/backends/multibackend.py
index cca82a59..6c57b3df 100644
--- a/cryptography/hazmat/backends/multibackend.py
+++ b/cryptography/hazmat/backends/multibackend.py
@@ -18,7 +18,7 @@ from cryptography.exceptions import (
     UnsupportedAlgorithm, UnsupportedCipher, UnsupportedHash
 )
 from cryptography.hazmat.backends.interfaces import (
-    CipherBackend, HashBackend, HMACBackend, PBKDF2HMACBackend, RSABackend
+    CipherBackend, HMACBackend, HashBackend, PBKDF2HMACBackend, RSABackend
 )
 
 
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py
index 7c058f58..fa21260c 100644
--- a/cryptography/hazmat/backends/openssl/backend.py
+++ b/cryptography/hazmat/backends/openssl/backend.py
@@ -20,23 +20,24 @@ import six
 
 from cryptography import utils
 from cryptography.exceptions import (
-    InvalidTag, InternalError, AlreadyFinalized, UnsupportedCipher,
-    UnsupportedAlgorithm, UnsupportedHash, UnsupportedPadding, InvalidSignature
+    AlreadyFinalized, InternalError, InvalidSignature, InvalidTag,
+    UnsupportedAlgorithm, UnsupportedCipher, UnsupportedHash,
+    UnsupportedPadding
 )
 from cryptography.hazmat.backends.interfaces import (
-    CipherBackend, HashBackend, HMACBackend, PBKDF2HMACBackend, RSABackend
+    CipherBackend, HMACBackend, HashBackend, PBKDF2HMACBackend, RSABackend
 )
 from cryptography.hazmat.bindings.openssl.binding import Binding
-from cryptography.hazmat.primitives import interfaces, hashes
+from cryptography.hazmat.primitives import hashes, interfaces
 from cryptography.hazmat.primitives.asymmetric import rsa
 from cryptography.hazmat.primitives.asymmetric.padding import (
-    PKCS1v15, PSS, MGF1
+    MGF1, PKCS1v15, PSS
 )
 from cryptography.hazmat.primitives.ciphers.algorithms import (
-    AES, Blowfish, Camellia, CAST5, TripleDES, ARC4, IDEA
+    AES, ARC4, Blowfish, CAST5, Camellia, IDEA, TripleDES
 )
 from cryptography.hazmat.primitives.ciphers.modes import (
-    CBC, CTR, ECB, OFB, CFB, GCM,
+    CBC, CFB, CTR, ECB, GCM, OFB
 )
 
 
diff --git a/cryptography/hazmat/bindings/commoncrypto/binding.py b/cryptography/hazmat/bindings/commoncrypto/binding.py
index ee809425..3673ea36 100644
--- a/cryptography/hazmat/bindings/commoncrypto/binding.py
+++ b/cryptography/hazmat/bindings/commoncrypto/binding.py
@@ -13,8 +13,8 @@
 
 from __future__ import absolute_import, division, print_function
 
-import sys
 import platform
+import sys
 
 from cryptography.hazmat.bindings.utils import build_ffi
 
diff --git a/cryptography/hazmat/primitives/ciphers/base.py b/cryptography/hazmat/primitives/ciphers/base.py
index 1275019e..f5dd2ed5 100644
--- a/cryptography/hazmat/primitives/ciphers/base.py
+++ b/cryptography/hazmat/primitives/ciphers/base.py
@@ -15,7 +15,7 @@ from __future__ import absolute_import, division, print_function
 
 from cryptography import utils
 from cryptography.exceptions import (
-    AlreadyFinalized, NotYetFinalized, AlreadyUpdated, UnsupportedInterface
+    AlreadyFinalized, AlreadyUpdated, NotYetFinalized, UnsupportedInterface
 )
 from cryptography.hazmat.backends.interfaces import CipherBackend
 from cryptography.hazmat.primitives import interfaces
diff --git a/cryptography/hazmat/primitives/kdf/pbkdf2.py b/cryptography/hazmat/primitives/kdf/pbkdf2.py
index f70a7ddf..705e45d7 100644
--- a/cryptography/hazmat/primitives/kdf/pbkdf2.py
+++ b/cryptography/hazmat/primitives/kdf/pbkdf2.py
@@ -17,7 +17,7 @@ import six
 
 from cryptography import utils
 from cryptography.exceptions import (
-    InvalidKey, UnsupportedHash, AlreadyFinalized, UnsupportedInterface
+    AlreadyFinalized, InvalidKey, UnsupportedHash, UnsupportedInterface
 )
 from cryptography.hazmat.backends.interfaces import PBKDF2HMACBackend
 from cryptography.hazmat.primitives import constant_time, interfaces