how to install requirements.txt in python code example

Example 1: install requirements.txt

pip install -r requirements.txt

Example 2: pip install from requirements.txt

$ pip install -r requirements.txt

Example 3: 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 4: pip3 install requirements.txt

pip3 install -r requirements.txt

Example 5: how to get requirements .txt

pip freeze > requirements.txt

Example 6: pip install requirements.txt

pip3 install -r requirements.txt