Fixed AttributeError when using @TypeChecked on a metaclass

Fixes #88.

docs/versionhistory.rst

@@ -7,6 +7,7 @@ This library adheres to `Semantic Versioning 2.0 <https://semver.org/#semantic-v
 
 - Fixed import errors when using the import hook and trying to import a module that has both a
   module docstring and ``__future__`` imports in it
+- Fixed ``AttributeError`` when using @typechecked on a metaclass
 
 **2.6.0** (2019-11-06)
 

tests/dummymodule.py

@@ -31,7 +31,11 @@ def inner(x: argtype) -> return_annotation:
     return inner(arg)
 
 
-class DummyClass:
+class Metaclass(type):
+    pass
+
+
+class DummyClass(metaclass=Metaclass):
     def type_checked_method(self, x: int, y: int) -> int:
         return x * y
 

typeguard/__init__.py

@@ -717,7 +717,7 @@ class with this decorator.
     if isclass(func):
         prefix = func.__qualname__ + '.'
         for key in dir(func):
-            attr = getattr(func, key)
+            attr = getattr(func, key, None)
             if callable(attr) and attr.__qualname__.startswith(prefix):
                 if getattr(attr, '__annotations__', None):
                     setattr(func, key, typechecked(attr, always=always))