09_closures.py

def make_incrementors(start, amounts):
    y = [start]
    results = []
    for x in amounts:
        def add_x():
            y[0] += x
            return y[0]
        results.append(add_x)
    return results

incrementors = make_incrementors(7, [1, 2, 3, 4, 5])
print(incrementors)
print(incrementors[0]())
print(incrementors[1]())
print(incrementors[2]())