Create pip_tools.md

python/pip_tools.md

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+# Using `pip-tools` and `pip-compile` for Python dependency management 
+
+## Links 
+
+- [`pip-tools`](https://github.com/jazzband/pip-tools/)
+- [`pip-compile`](https://github.com/jazzband/pip-tools/?tab=readme-ov-file#example-usage-for-pip-compile)
+
+## Use case 
+
+I want to keep my requirements up to date and I don't want to worry about it.  
+
+## Instructions 
+
+Note: Even in a Docker setup, I still use pip tools in a virtual env outside of Docker. It's generally always been faster. 
+
+1. Install`pip-tools` with `pip install pip-tools`
+2. Put your requirements in a `requirements.in` file:
+
+```
+boto3
+django
+django-extensions
+```
+
+3. Run `pip-compile requirements.in --output-file requirements.txt`
+4. You will see the "pinned" version of the requirements in a `requirements.txt` file.
+5. Rebuild your Docker container or reinstall your requirements however you do that.
+
+The output in `requirements.txt` will be something like: 
+
+```
+# This file is autogenerated by pip-compile with Python 3.10
+# by the following command:
+#
+#    pip-compile requirements.in
+#
+asgiref==3.6.0
+    # via django
+django==4.1.7
+    # via -r requirements.in
+sqlparse==0.4.3
+    # via django
+```
+
+You can see the source of every installed package, not just the ones you defined in your `requirements.in`. 
+