JuniorTheoryCommon

What happens when this program runs?

Python

count = 0


def increment():
    count = count + 1
    return count


print("start")
print(increment())

Prints start, then raises UnboundLocalError

Expecting 1, as if count + 1 read the global: the assignment makes count local in the whole function, and that local has no value yet.
Expecting the error before start: the function body runs only when it is called, so start prints first and the error comes on the call.

JuniorTheoryCommon

Python

count = 0


def increment():
    count = count + 1
    return count


print("start")
print(increment())

Prints start, then raises UnboundLocalError

Expecting 1, as if count + 1 read the global: the assignment makes count local in the whole function, and that local has no value yet.
Expecting the error before start: the function body runs only when it is called, so start prints first and the error comes on the call.