[venv] How to use Virtual Environment with Built-in venv module

Step1 : Creating and activating a new virtual environment

$ python3 -m venv project_env 
$ source project_env/bin/activate

 

We can create virtual environment with system-packages(global installation of Python packages).

 

$ python3 -m venv project_env --system-site-package

 

Step2 : Check installed packages on virtual environment

$ pip install pytz 
$ pip list 

Package  Version 
-------  -------
certifi  2019.3.9
pytz     2018.9

 

We can get information of installed packages in txt format from pip freeze command with redirection.

 

$ pip freeze > requirement.txt

 

We can also install all the same packages stored in requirements.txt.

 

$ pip install -r requirements.txt

 

Step3 : Deactivating and Delete a virtual environment

$ deactivate

$ rm -rf project_env/

 

 

 

Source from : https://www.youtube.com/watch?v=Kg1Yvry_Ydk&list=PL-osiE80TeTskrapNbzXhwoFUiLCjGgY7&index=24