for i in range(4): print(f"outer: {i}") for i in range(4): print(f" inner: {i}")
Standard input is empty
outer: 0 inner: 0 inner: 1 inner: 2 inner: 3 outer: 1 inner: 0 inner: 1 inner: 2 inner: 3 outer: 2 inner: 0 inner: 1 inner: 2 inner: 3 outer: 3 inner: 0 inner: 1 inner: 2 inner: 3