[Python] What does the yield keyword do in Python, and when should I use a generator instead...

I'm trying to optimize a function that processes a very large file line by line. I’ve seen some examples use the yield keyword, but I don't fully understand how it differs from return. When I use yield, the function doesn't seem to execute the whole way through immediately.

Specifically:1. What is the fundamental difference between return and yield?

2. In what specific scenarios (besides file processing) are generators and the yield keyword better than creating and returning a large list?

(Example code showing a simple generator vs. a simple function returning a list would go here.)

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