can not import name invalidate_caches

[wavic]

I just showed the result in Python 2.7
I read all the posts 

[Bani]

Is this issue raised by you?

Yes, it is.

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You didn't happen to name one of your files "importlib.py", did you?

The error is saying that the file is found, but that the function doesn't exist within it.  Since importlib is part of the standard library, maybe the file's being shadowed somewhere?

No, I don't have a file named "importlib.py".