import time
import sys

class A:
    def foo(self):
        print("Call A.foo!")

    def __getattr__(self, name):
        return 2

    @property
    def ppp(self):
        return 3

class B(A):
    def foo(self):
        print("Call B.foo!")


class C(B):

    def __init__(self) -> None:
        self.pps = 1

    def foo(self):
        print("Call C.foo!")


def main():
    start = time.time()
    for i in range(1, 1000000):
        pass
    end = time.time()
    peer = end - start
    c = C()
    print(f"Python version of {sys.version}")
    start = time.time()
    for i in range(1, 1000000):
        s = c.pps
    end = time.time()
    print(f"Normal getattr spend time: {end - start - peer}")
    start = time.time()
    for i in range(1, 1000000):
        s = c.ppa
    end = time.time()
    print(f"Call __getattr__ spend time: {end - start - peer}")
    start = time.time()
    for i in range(1, 1000000):
        s = c.ppp
    end = time.time()
    print(f"Call property spend time: {end - start - peer}")

if __name__ == "__main__":
    main()