When should I use generator expressions instead of lists?

When should I use generator expressions instead of lists?

You should use generator expressions when you want to save memory and improve performance, especially with large datasets.

Can you give me an example of a generator expression?

Sure! A simple example is: sum(x*x for x in range(10)), which calculates the sum of squares without creating a list.

What are the benefits of using generator expressions?

The main benefits are lower memory usage and potentially faster execution since values are generated on-the-fly.

Are there any downsides to using generator expressions?

Yes, one downside is that you can only iterate through a generator once. If you need to access the data multiple times, a list might be better.