Python-сообщество

#-*- coding: utf-8 -*-
import datetime, random, turtle
def write_log(string):
    with open("log", 'a') as f:
        f.write("%s - %s\n" % (datetime.datetime.now().strftime("%d.%m.%Y %H:%M:%S"), string))
def random_int():
    return [random.randint(50, 200) for i in range(3)]
def draw_cube(z):
    turtle.tracer(1)
    turtle.reset()
    turtle.color("red")
    for i in range(len(z)):
        turtle.up()
        turtle.goto(random.randint(10, 100), random.randint(10, 100))
        turtle.down()
        for j in range(3):
            turtle.forward(z[i])
            turtle.left(90)
        turtle.forward(z[i])
        turtle.color("blue")
    turtle.up()
    turtle.goto(-800, -800)
    turtle.getscreen()._root.mainloop()
def draw_circle(z, s):
    turtle.tracer(1)
    turtle.reset()
    for i in range(len(z)):
        turtle.up()
        turtle.goto(random.randint(10, 100), random.randint(10, 100)-200)
        if z[i] > s:
            turtle.color("red")
        else:
            turtle.color("blue")
        turtle.down()
        turtle.circle(z[i])
    turtle.up()
    turtle.goto(-800, -800)
    turtle.getscreen()._root.mainloop()
def sub_a():
    write_log("вызвана подпрограмма 1")
    z = random_int()
    z.sort()
    z.reverse()
    draw_cube(z)
def sub_b():
    write_log("вызвана подпрограмма 2")
    z = random_int()
    s = sum(z)/3
    draw_circle(z, s)
while True:
    c = input("Command: ")
    cl = c.lower()
    if cl == "x":
        write_log("введена комманда " + c)
        write_log("работа закончена")
        exit()
    elif cl == "l":
        try:
            with open("passw", 'r') as f:
                login = f.readline().split()[0]
                passw = f.readline().split()[0]
            try:
                inp_login = input("Login: ")
                inp_passw = input("Password: ")
                if inp_login == login and inp_passw == passw:
                    with open("log", 'r') as f:
                        print(f.read())
            except FileNotFoundError:
                print("Файл не найден :(")
        except FileNotFoundError:
            print("Файл с паролем не найден :(")
    elif cl == "a":
        write_log("введена команда " + c)
        sub_a()
    elif cl == "b":
        write_log("введена команда " + c)
        sub_b()
    else:
        write_log("ошибка: неправильная команда " + c)

python36 - login
m2317 - password