Networking w/ Python

I have started the Codecademy Learn Python 3 course and as I am going through it I am having a hard time connecting it to how Python can help me for day to day networking.

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So I ask of you:

1. What was your first Python program? What did it do and why did you need it?
2. Where do you run your programs? From what I can tell, they can be run directly on the IOS-XE devices.
3. What real life problems have Python programs solved for you or how did they make you more efficient?
4. Any links to must have programs? Like scripts you think everyone could benefit from.
5. How did you transition from CLI to Python/API?
6. Useful tools.
7. Courses/Books you used.

Thanks!