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Showing content from https://mail.python.org/pipermail/python-dev/2012-January/115995.html below:

[Python-Dev] threading.Semaphore()'s counter can become negative for non-ints

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>> import threading
>> s = threading.Semaphore(0.5)
>
> But why would you want to pass a float? It seems like API abuse to me.

If something should be changed, Semaphore(arg) should raise a
TypeError if arg is not an integer.

Victor

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