Python 2 and Python 3 Coexistence Solutions (VIRTUALENV) __python

Install the Virtualenv tool:

For WIN10:

1. Install Virtualenv

Win+r--> cmd--> pip install virtualenv are as follows:

C:\users\thinkpad>pip Install virtualenv
collecting virtualenv
  downloading VIRTUALENV-15.1.0-PY2.PY3-NONE-ANY.WHL (1.8MB)
    100% |████████████████████████████████| 1.8MB 473kb/s
Installing collected packages:virtualenv
successfully installed virtualenv-15.1.0 you
are using PIP version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the ' python-m pip install--upgrade pip ' command.

C:\users\thinkpad>

2. Create Virtual space

1 Create a virtual environment for the Python2 workspace, D:\python\py27 is created automatically when the following command is executed, without having to manually create it in advance.

C:\users\thinkpad>virtualenv-p D:\python2\python.exe D:\python\py27
Running virtualenv with interpreter d:\ Python2\python.exe
New python executable in D:\python\py27\Scripts\python.exe
installing Setuptools, Pip, Wheel...done.

2 Create a virtual environment for the Python3 workspace, D:\python\py36 is created automatically when the following command is executed, without having to manually create it in advance.

C:\users\thinkpad>virtualenv-p C:\Users\ThinkPad\AppData\Local\Programs\Python\Python36-32\python.exe D:\ python\py36
Running virtualenv with interpreter C:\Users\ThinkPad\AppData\Local\Programs\Python\Python36-32\ Python.exe
Using base prefix ' c:\\users\\thinkpad\\appdata\\local\\programs\\python\\python36-32 '
New Python executable in D:\python\py36\Scripts\python.exe
installing Setuptools, Pip, Wheel...done.

http://blog.csdn.net/ybdesire/article/details/50486777