How do I use a requirements.txt file with a Python virtual environment?

How do I use a requirements.txt file with a Python virtual environment?

To use a requirements.txt file with a Python virtual environment, first activate your venv, then run pip install -r requirements.txt.

What if I don't have a requirements.txt file?

You can create one by running pip freeze > requirements.txt after installing your packages in the virtual environment.

Can I update the packages listed in requirements.txt?

Yes, you can update packages by modifying the versions in requirements.txt and running pip install -r requirements.txt again.

Is there a way to create a requirements.txt file automatically?

Yes, you can use pip freeze > requirements.txt to generate it automatically based on the currently installed packages.