Windows under virtualenv use

Under Windows virtualenv using Winpythonvirtualenv

First install two different versions of Python on your computer

mkvirtualenv --python C:\Python34 E:\python34

Mkvirtual is a command to create a virtual environment
--python is an option for other specified Python versions
C:\PYTHON34 is the interpreter directory for PYTHON34
E:\python34 is a directory of environment installations

Activation command

cd python34cd

And then it went into Python34 's virtual environment.

Enter the interpreter for Python to successfully activate Python34 in the command

Other operations

Pip and Setuptools built into the virtual environment
Install the software directly
Pip Install Packages_name
Rmvirtualenv python34 Deleting a python34 virtual environment
Mkvirtualenv--no-site-pagages do not install additional packages

Windows under virtualenv use