1、tensorflow · PyPI.html（https://pypi.org/project/tensorflow/）
"tensorflow-1.1.0rc2-cp27" download address: https://pypi.org/project/tensorflow/1.1.0rc2/#files
ZC: Where historical versions of whl not find a list of files in ...
ZC: online to see files can be directly downloaded whl change the suffix name changed to zip or rar, and then extract
2, source:
https://github.com/tensorflow/tensorflow/tags , it looks like a historical version to download the source code of the place
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