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1. Tensorflow And python Version correspondence of ：

edition                     Python edition      Release time of last version
tensorflow-2.4.0    3.6-3.8    2020 year 12 month
tensorflow-2.3.0    3.5-3.8    2020 year 7 month
tensorflow-2.2.0    3.5-3.8    2020 year 5 month
tensorflow-2.1.0    3.5-3.7    2020 year 1 month
tensorflow-2.0.0    3.5-3.7    2019 year 10 month
tensorflow-1.15.0    3.5-3.7    2019 year 10 month
tensorflow-1.14.0    3.5-3.7    2019 year 6 month
tensorflow-1.13.0    3.5-3.7    2019 year 2 month
tensorflow-1.12.0    3.5-3.6    2018 year 11 month
tensorflow-1.11.0    3.5-3.6    2018 year 9 month
tensorflow-1.10.0    3.5-3.6    2018 year 8 month
tensorflow-1.9.0    3.5-3.6    2018 year 7 month
tensorflow-1.8.0    3.5-3.6    2018 year 4 month
tensorflow-1.7.0    3.5-3.6    2018 year 3 month
tensorflow-1.6.0    3.5-3.6    2018 year 3 month
tensorflow-1.5.0    3.5-3.6    2018 year 1 month
tensorflow-1.4.0    3.5-3.6    2017 year 11 month
tensorflow-1.3.0    3.5-3.6    2017 year 8 month
tensorflow-1.2.0    3.5-3.6    2017 year 6 month
tensorflow-1.1.0    3.5    2017 year 4 month
tensorflow-1.0.0    3.5    2017 year 2 month

2. Tensorflow whl File download ：

Tensorflow In the use of , It is often necessary to specify a version . Use pip install Installing from the Internet often timeout. So you need to download whl file .

tensorflow · PyPITensorFlow is an open source machine learning framework for everyone.https://pypi.org/project/tensorflow/2.3.0/#files

Different versions tensorflow, Replace the intermediate version ,2.3.0 that will do .

Or Qinghuayuan

Links for tensorflow

3. 

 sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.8 3

4. A fantastic website ：

Python Code ExamplesSearch portal for python code exampleshttps://www.programcreek.com/python/