How multiple versions of Python are set without conflicts

　　　　Also equipped with Python2.7 and Python3.5 instructions.

1: Set up a Python version that right-clicked the "Edit with IDLE" option?

Enter the registry in the run input "regedit";

Find [Hkey_classes_root\python.file\shell\edit with Idle\command] and you can see that the data has been modified to version 2.7

Double-click Default to change the value to "C:\Users\Administrator\AppData\Local\Programs\Python\Python35-32\pythonw.exe" C:\Users\ Administrator\appdata\local\programs\python\python35-32\lib\idlelib\idle.pyw "-E"%1 "

Issue 2: How to specify a double-click program to open the ". Py" File

Enter the registry in the run input "regedit";

Find [Hkey_classes_root\python.file\shell\open\command]

Change the value to "C:\Users\Administrator\AppData\Local\Programs\Python\Python35-32\py.exe" "%l"%*

Modify the environment variable at the same time path C:\Users\Administrator\AppData\Local\Programs\Python\Python35-32; C:\Users\Administrator\AppData\Local\Programs\Python\Python35-32\Scripts

Issue 3: Use 2.7 When using 2.7 Runtime, right-click to execute

Enter the registry in the run input "regedit";

Locate the new "run through Python2.7" item in the [Hkey_classes_root\python.file\shell] entry, and in the new item "command", set the default value to "C:\Python27\python.exe" "%1"%*

Issue 4: If both Python3.5 and Python2.7 are present in the system, enter Python in command mode and the default is execute python2.7

Note: Enter quit () or exit () to exit Python2.7, if you want to enter Python3? You only need to enter Python-3.

Problem 5:pip Installing a new module

Python2.7 is using the PIP module name

Python3.5 is using the py-3-m pip install xxxx command.

Where the problem 4,5 not practiced, the direct copy of the Little Turtle

This article refers to: How to make multiple versions of Python coexist harmoniously http://bbs.fishc.com/thread-58701-1-1.html

How multiple versions of Python are set without conflicts