First, why use a virtual environment virtualenv
- Depend in each virtual environment independent of each other, a different set of items may be used alone python environment, to reduce the impact of the respective dependencies
- Easier to deploy
- Containerized
Two, virtualenv create a virtual environment
Third, why create a virtual environment using virtrualenvwrapper
- Convenient and efficient to create a separate virtual Python development environment
- Virtualenv are extensions, including functions virtualenv
- Create a virtual environment more convenient unified management than virtrualenv
The use of virtual environments virtualenvwrapper
1, the installation virtualenvwrapper
Install window environment
pip install virtualenvwrapper-win
Installation under Linux / MacOS environment
pip install virtrualenvwrapper
2, virtualenvwrapper basic use
(1) to create a virtual environment
mkvirtualenv xxxmy_env [virtual environment project name]
Note: The project mkvirtualenv created by default stored in the current user / Env directory systems, such as: window system, located in the C: / Users / current user / Env directory
(2) other context switching
workon my_env [need to switch to a virtual environment project name]
C:\Users\Administrator>workon
Pass a name to activate one of the following virtualenvs:
==============================================================================
slyangEnv
slyangEnv2(3) to exit the current virtual environment
deactivate
(4) remove a virtual environment
rmvirtualenv my_env
(5) List all virtual environments
livirtualenv
(6) to the directory where the virtual environment
cdvirtualenv
(7) Modify the default virtual environment management path
Step 1: System Settings> Environment Variables> in the Path environment variable, add WORK_HOME variables, fill out the address for the directory file folder unified management of virtual environments
WORK_HOME = C: / ENV
every time mkvirtualenv my_env generated by the project will be stored in C: / ENV / my_env in
(8) to create a virtual environment when designated python version
mkvirtualenv --python == C: \ Python36 \ python.exe my_env [ virtual environment project name]
Results: my_env virtual environment directory, python36 version of