Requested pylzma==0.5.0 but installing version is 0.5.0.post0

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Install on ARM64 arch ubuntu 16.04, got this with pip3 install pylzma==0.5.0
Python version 3.5.2

WARNING: Requested pylzma==0.5.0 from https://files.pythonhosted.org/packages/03/d8/10ef072c3cd4301a65a1b762b09eefa02baf8da23b9ea77ebe9546499975/pylzma-0.5.0.tar.gz#sha256=b874172afbf37770e643bf2dc9d9b6b03eb95d8f8162e157145b3fe9e1b68a1c, but installing version 0.5.0.post0

What is this meaning? Why would it happen? Thank you for solving this problem

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I think I got it is a convention for naming after reading PEP0440, but shouldn't it change the package version as well?

It will break some dependencies when another package requires it as pylzma=0.0.5