What are the differences between generator expressions and list comprehensions?

What are the differences between generator expressions and list comprehensions?

Generator expressions return an iterator and are more memory efficient, while list comprehensions return a list.

Can you give me an example of each?

Sure! A list comprehension looks like this: [x**2 for x in range(5)], while a generator expression is (x**2 for x in range(5)).

When should I use one over the other?

Use generator expressions when working with large datasets to save memory, and list comprehensions for smaller datasets where you need a list.

Are there any performance differences?

Yes, generator expressions can be faster for large data because they yield items one at a time, while list comprehensions create the entire list in memory.