Libraries are collections of shared code. They're common in Python, where they're also called "modules," but they're also ...

Google Colab makes it easy to write and execute Python code online. If you want to save your Colab notebook to Github, follow these steps.

One more note: Python is ruthlessly obedient. If you just spent 20 hours running a program and you save the file as temp_data.txt. Then later you run something and save it as temp_data.txt - done.