pip create environment from requirements.txt code example
Example 1: pip freeze requirements.txt
$ env1/bin/pip freeze > requirements.txt
$ env2/bin/pip install -r requirements.txt
Example 2: how to get requirements .txt
pip freeze > requirements.txt
Example 3: python install library in virtualenv
1º - Instal Python3 and pip3
2º - Create a folder for your virtual environment:
>> cd "path_to_the_place_you_want_to_locate_your_folder"
>> python3 -m venv "name_of_env"
3º - Activate this virtual environment:
>> source "name_of_env"/bin/activate
4º - Now you can install new things inside this environment:
>> pip3 install django
Example 4: how to use virtual environment python
source env/bin/activate