====== Requirements Files for Python ======

In Python, a requirements.txt file is used to keep track of the modules and packages used in a project.

===== Create a requirements.txt File =====

<code bash>
pip freeze > requirements.txt
</code>

===== Install Packages from requirements.txt =====

<code bash>
pip install -r requirements.txt
</code>

===== Maintain a requirements.txt File =====

See which packages are out of date:

<code bash>
pip list --outdated
</code>

Update package(s), as needed:

<code bash>
pip install -U package_name
</code>

Generate a new requirements.txt file:

<code bash>
pip freeze > requirements.txt
</code>

{{tag>python}}