Common commands for Python

gistfile1.txt

Note different python builds can have different modules, they do not share modules

Python 2.7 has it own pip and pipenv

Python 3.7 has it pip3 and pipenv

Upgrading pip3 and pipenv for python 3

pip3 install --upgrade pip.

pip3 install --upgrade pipenv

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sudo rm /usr/bin/python3
sudo ln -s /usr/bin/python3.5 /usr/bin/python3

Set python 3.5 as default python3, when running the command python3, it should point to python3.5

Note, multiple python versions is allowed on Linux, if you install python 3.6 and 3.7 from source code, then the binary executable will be installed in "/usr/local/bin/python3.7" instead of "/usr/bin/python3.7"