1. Install virtualenv
pip install virtualenv
2. Create a virtual environment
virtualenv [virtual environment name]
3. Enter the virtual environment
Version 3.7 - into the virtual environment created folder below the Scripts folder, that is, into the virtual environment. Prior to version ~ (Scripts execute activate command in the file into the virtual environment.)
4. Exit the virtual environment
In addition to version 3.7 ~ Scripts folder is not a virtual environment. Prior to version ~ (deactivate command execution in the Scripts folder into the virtual environment.)
Specifies the python interpreter 5. Create a virtual environment
virtualenv -p [python interpreter path, such as: C: \ Python37 \ python.exe] [virtual environment name]