introduce @command.argument

This makes it possible to specify more specific type annotations at runtime,
so that both mypy and our command system are happy. The .argument(name, type=)
syntax is similar to click's, so it should be fairly extensible if we need it.

1 files changed, 1 insertions, 1 deletions

diff --git a/mitmproxy/utils/typecheck.py b/mitmproxy/utils/typecheck.py
index c5e289a4..87a0e804 100644
--- a/mitmproxy/utils/typecheck.py
+++ b/mitmproxy/utils/typecheck.py
@@ -31,7 +31,7 @@ def check_command_type(value: typing.Any, typeinfo: typing.Any) -> bool:
                 return False
     elif value is None and typeinfo is None:
         return True
-    elif (not isinstance(typeinfo, type)) or (not isinstance(value, typeinfo)):
+    elif not isinstance(value, typeinfo):
         return False
     return True