Combine two lists l1 x l2 into tuples

Question

In one line, how can I generate a list which contains the tuples of all pairs of l1 x l2.

Example: [1,2] et ['a','b'] -> [(1,'a'), (1,'b'), (2,'a'), (2,'b')]

I tried to use map() and zip() but I haven't found the answer yet.

Answer 1

you can use itertools.product

from itertools import product
numbers = [1,2]
letters = ['a','b']
result = list(product(numbers,letters))

Answer 2

It's as simple as this. Below is an example of a double iteration in listcomprehension.

numbers = [1,2]
letters = ['a','b']
new  = [(num,letter) for num in numbers for letter in letters]

output

[(1, 'a'), (1, 'b'), (2, 'a'), (2, 'b')]

Answer 3

You can use list comprehension.

list3 = [(l1,l2) for l1 in list1 for l2 in list2]