python3 install a virtual environment (windows)

1.pip install virtualenv   : installation command

2.pip install virtualenvwrapper-win : the installation command

3. Configure WORK_HOME environment variables:

　　Variable name: WORK_HOME

　　Variable value: D: \ myenv

4. Create a virtual environment command: mkvirtualenv myblog

5. view all installed virtual environment: workon

6. enter the virtual environment: workon myblog

7. The launch of the virtual environment: deactivate