How can I flatten a list of lists in Python using comprehensions?

How can I flatten a list of lists in Python using comprehensions?

You can use a list comprehension to flatten a list of lists. For example:

flattened = [item for sublist in list_of_lists for item in sublist]

Can you explain how that works?

Sure! The comprehension iterates over each sublist in list_of_lists, and then over each item in that sublist, collecting all items into a single list.

What if I have a list with different lengths?

The same comprehension will work regardless of the lengths of the sublists. It will still flatten all items into one list.

Are there any other methods to flatten a list?

Yes, you can also use the itertools.chain method or the numpy library if you're working with numerical data.