Update Lib/inspect.py

Co-authored-by: sobolevn <mail@sobolevn.me>

Author: yihong0618

Lib/inspect.py

@@ -819,9 +819,9 @@ def getfile(object):
     if ismodule(object):
         if getattr(object, '__file__', None):
             return object.__file__
-        if object.__spec__ is not None:
+        if getattr(object, '__spec__', None) is not None:
             raise TypeError(f'{object!r} is a built-in module')
-        raise TypeError(f'Custom module: {object!r} cannot get source')
+        raise TypeError(f'Cannot get source from {object!r}')
     if isclass(object):
         if hasattr(object, '__module__'):
             module = sys.modules.get(object.__module__)