pytypes breaks @autoreload in a somewhat dangerous way

If I decorate a class method with @typechecked, it works, but breaks autoreload, generating this error:

[autoreload of pytypes.typechecker failed: Traceback (most recent call last):
  File "/Users/srinivas/opt/anaconda3/lib/python3.8/site-packages/IPython/extensions/autoreload.py", line 245, in check
    superreload(m, reload, self.old_objects)
  File "/Users/srinivas/opt/anaconda3/lib/python3.8/site-packages/IPython/extensions/autoreload.py", line 394, in superreload
    module = reload(module)
  File "/Users/srinivas/opt/anaconda3/lib/python3.8/imp.py", line 314, in reload
    return importlib.reload(module)
  File "/Users/srinivas/opt/anaconda3/lib/python3.8/importlib/__init__.py", line 148, in reload
    raise ImportError(msg.format(name), name=name)
ImportError: module MYCLASS not in sys.modules
]

where MYCLASS is the name of the class i’m working on

[agronholm]

I too don’t have the capacity to research this, but once the root cause is understood and pytypes/typeguard found to do something wrong, I will of course fix typeguard if possible.

[Stewori]

Another thing to try is to check whether the order of decorators makes a difference. Since typeguard is affected similarly, it is worth a try to ask @agronholm whether he happens to know the cause.