multiply_by = []
for i in range(11):
    def multiply_by_i(x):
        return i * x
    multiply_by.append(multiply_by_i)

>>> multiply_by[1](1)
10
>>> multiply_by[4](5)
50

def multiply_by_i(i):
    def multiply_by_x(x):
        return i * x
    return multiply_by_x

multiply_by = []
for i in range(11):
    multiply_by.append(multiply_by_i(i))