how to make requirements.txt python code example

Example 1: install requirements.txt

pip install -r requirements.txt

Example 2: command to make requirements.txt

pip freeze > requirements.txt

Example 3: pip freeze requirements.txt

$ env1/bin/pip freeze > requirements.txt
$ env2/bin/pip install -r requirements.txt

Example 4: python requirements.txt

pip freeze #view requirements to be created (best done in virtual env)
pip freeze > requirements.txt #create requirements.txt (best done in virtual env)
pip install -r requirements.txt #install requirements.txt (best done in virtual env)

Example 5: how to generate requirements.txt django

For Unix families: pip3 freeze > requirements.txt
For Windos: pip freeze > requirements.txt

Example 6: how to have requirement file in python for libs

pip3 freeze > requirements.txt