how to split tuples into two lists?

Question

The function foo below takes in a number and returns a tuple of strings. Can I write the following loop as a one-liner?

r1 = []
r2 = []
for i in range(10):
  (s1, s2) = foo(i)
  r1.append(s1)
  r2.append(s2)

# r1 now has the first returned strings from each iteration of the loop, and similarly for r2

Answer 1

You just need to do this simple

r1, r2 = map(list, zip(*foo))

Answer 2

I would do something like this:

def foo(i):
    return (i,i+1)
r1, r2 = [tpl for tpl in zip(*map(foo,range(10)))]