All possible variants of zip in Python

Question

For example, I have a code looks like this:

a = [1, 2]
b = [4, 5]

How can I get something like this:

[(1,4), (1,5), (2,4), (2,5         


        

Answer 1

You can do this nicely with list comprehension, or better yet with a generator expression if you just need to iterate through the combinations.

Here's it is using list comprehension:

a = [1, 2]
b = [4, 5]

[(i, j) for i in a for j in b]

And here with a generator expression:

for pair in ((i, j) for i in a for j in b):
    print(pair)