Fix building of docs on python3.

The Mock object which is used when building docs returned another Mock for all
attributes except some special attributes.

In Python 3, `__qualname__` (which must be a string) and `__annotations__`
(which must be a dict) got added, which caused building docs to fail.

Fixes #49.

Author: The-Compiler

pytestqt/qt_compat.py

@@ -98,8 +98,10 @@ def __call__(self, *args, **kwargs):
         def __getattr__(cls, name):
             if name in ('__file__', '__path__'):
                 return '/dev/null'
-            elif name == '__name__':
+            elif name in ('__name__', '__qualname__'):
                 return name
+            elif name == '__annotations__':
+                return {}
             else:
                 return Mock()