Compatibility issues between python2 and 3 on Windows platform

Many friends have installedpython2 and 3, because some libraries such as scapy, not scrapy, and python3 are all wrong, so how to use python2 and 3 Coexist.

Like ordinary programmers, achieve the following results

• Compatibility issues under Windows platform

• CMD can enter the interactive mode of python2 and 3 respectively

• CMD can normally use the python2 and 3 versions corresponding to pip

Please follow the steps

1. Make sure to add the paths of python2 and 3 to the environmentVariables
   C:\Python27\ ;C:\Python27\Scripts\;C:\Python36\Scripts\;C:\Python36\Scripts\

2. Name the python.exe in the corresponding file as python2 .exe/python3.exe, name the pip.exe in the corresponding Scripts as pip2/pip3.exe. At this timeRestart the system

3. Open the command line interface, Enter python2/python3 and enter successfully! ! !

4. The last step is to check pip
   pip
pip2
   ...
   It will not work if you send it first , Alas, I was tricked by Baidu

5. Reinstall python2/3, python3 may not be uninstalled, rapair it first and then uninstall it.

The above is the process of how I was cheated, cherish life and stay away from Baidu
The following is the correct answer

• After installing python2/3, you will find that there is an additional *py.exe* program under the Windows file. This is the official correct solution.

• From the command line, you can follow the following commands
  py -2 Enter the editing interface of python2
  py -3Similarly
  py -2 -m various commands of pippython2 runs pip
  py -3 -m various commands of pipSimilar to the various commands
  py -2 -m one<a href="//m.sbmmt.com/wiki/1313.html" target="_blank">file</a>.pyRun onefile.py with python2
  py -3 -m onefile.py Same thing

I suggest friends to check out Zhihu more, remember this pitfall, and alert future generations

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