List of tuples to list of lists by position in tuple

Question

How to make list of lists from list of tuple by position ie

list_of_tuples = [(a, 2), (b, 5), (c, 6)]

to

list_of_lists = [[a, b, c], [2, 5, 6]]

Answer 1

You can use zip, and then map:

list_of_tuples = [(a, 2), (b, 5), (c, 6)]

new_list = zip(*list_of_tuples)

final_list = map(list, new_list)

print final_list

Edit:

As @PM 2Ring pointed out, in python 3, map returns an iterator, so it needs to be passed to list, if you really want a list:

final_list = list(map(list, new_list))

Answer 2

In Python 3+, map function returns map object. Therefore you have to convert map object to list by using: list(map_object). Here all code:

list_of_tuples = [('a', 2), ('b', 5), ('c', 6)]
zipped_list = zip(*list_of_tuples)
list_of_lists = list(map(list, zipped_list))
print(list_of_lists)