Python installation summary

1. Runtime error deletion program Python
   Windows fewer patches
2. Python
   environment variable configuration:
   Python: C: \ the User \ running \ AppData \ Local \ Programs \ Python \ Python37
   Pip: C: \ the User \ running \ AppData \ Local \ Programs \ Python \ Python37 \ Scripts
3. Unload
   a clean uninstall, you need to remove the installation directory
4. Upgrade PIP
   Python install -m PIP PIP --upgrade
5. dos window displays red for errors, such as: command errors. Yellow is a warning, such as: package upgrade, version number, observe the package, you can pip list to view the command. All the packages are installed pip lib \ site-packages in.