What are the differences between map and filter in Python?

What are the differences between map and filter in Python?

The map function applies a given function to all items in an iterable, while filter creates a list of elements for which a function returns true.

Can you give me an example of how to use both?

Sure! For map, you can use it like this: list(map(lambda x: x*2, [1, 2, 3])) which returns [2, 4, 6]. For filter, you can do: list(filter(lambda x: x > 1, [1, 2, 3])) which returns `[2, 3].

Are there any performance differences between them?

Yes, map can be faster than filter when applying a function to all elements, but it depends on the specific use case and the size of the data.

When should I use one over the other?

Use map when you want to transform all items in an iterable, and use filter when you want to select a subset of items based on a condition.