How do I access elements in nested lists in Python?

How do I access elements in nested lists in Python?

You can access elements in nested lists using multiple indices. For example, if you have a list like my_list = [[1, 2], [3, 4]], you can access the first element of the second list with my_list[1][0], which returns 3.

What if I want to access all elements in the nested lists?

You can use a loop to iterate through the nested lists. For example:

for sublist in my_list:
    for item in sublist:
        print(item)

Can I use list comprehensions for that?

Yes! You can use a list comprehension to flatten the nested list. For example:

flattened = [item for sublist in my_list for item in sublist]
``` This will give you a single list with all the elements.

What if the lists are of different lengths?

The same methods apply! You can still access elements using indices, but be careful with the index range to avoid IndexError. You can check the length of each sublist before accessing its elements.