Install both Python2.7.10 and 3.5.0 under Windows

1. Download the two latest version of the Python installation package on the Python website: www.python.org

Windows x86-64 Executable Installer

Windows x86-64 MSI Installer

Separately installed in C:\Python35 and C:\Python27

2. Check the following 4 variables in the PATH environment variable (the environment variables in path are separated by semicolons):

1) c:\Python27

2) c:\Python27\Scripts

3) C:\Python33

4) c:\Python33\Scripts

Which one is less, and the semicolon is separated

3. Go to the Python35 directory and rename the Python.exe to Python3.exe

Go to the Python27 directory and rename the Python.exe to Python2.exe

4. In command line mode, input Python3 or Python2 can enter the corresponding interactive environment

5. go to the Python installation path find the Scripts folder, go inside to find pip*-script.py, open modify the first sentence for the Python interpreter you want to specify

　　

Install both Python2.7.10 and 3.5.0 under Windows