Быки и коровы

import random
def random_number():
    number = [0,0,0,0]
    digit1 = random.randint(1,9)
    digit2 = random.randint(0,9)
    digit3 = random.randint(0,9)
    digit4 = random.randint(1,9)
    if digit1 != digit2 and digit1 != digit3 and digit1 != digit4 and digit2 != digit3 and digit2 != digit4 and digit3 != digit4:
        
        number[0] = digit1
        number[1] = digit2
        number[2] = digit3
        number[3] = digit4
        print(number)
        return number
    else:
        random_number()
 
def user_number():
    user_input = input("Please enter 4 digits number to play ")
    usernumber = [0,0,0,0]
    if len(user_input) == 4 and user_input.isdigit():
       
        usernumber[0] = user_input[0]
        usernumber[1] = user_input[1]
        usernumber[2] = user_input[2]
        usernumber[3] = user_input[3]
        print(usernumber)
        return usernumber
        
    else:
        print("****Please enter valid 4 digits number*****")
        user_number()
 
 
random_number()
user_number()

#!/usr/bin/env perl3
 
#
# Bulls and Cows
#
 
import random
 
digits = [ x for x in range(10) ]
random.shuffle(digits)
conceived = digits[:4]
if conceived[0] == 0 :
    conceived[0] = conceived[1]
    conceived[1] = 0
 
while True:
    guessed = int(input("Number: "))
    if not 999 < guessed < 10000 :
        print("Need number from 1000 to 9999")
        continue
    testing = [ int(x) for x in str(guessed) ]
    if testing == conceived :
        print("Oh yeah! You win!")
        print("It was", conceived)
        break
    for n, d in enumerate(testing) :
        if conceived[n] == d :
            print("B", end="")
        elif d in conceived :
            print("C", end="")
        else :
            print(d, end="")
    print()

import random
 
 
def generate_answer():
    n = [i for i in range(10)]
    number = []
    for _ in range(4):
        a = n.pop(random.choice(range(len(n))))
        number.append(str(a))
    return ''.join(number)
 
 
def cows_bulls(num, answer):
    cows = 0
    bulls = 0
    for i in range(4):
        if str(num)[i] == str(answer)[i]:
            bulls += 1
        elif num[i] in str(answer):
            cows += 1
    return [bulls, cows]
 
 
def play():
    global answer
    bulls = 0
    print(answer)
    while bulls < 4:
        attempt = input('Введите четырёхзначное число c неповторяющимися цифрами: ')
        bulls, cows = cows_bulls(attempt, answer)
        if bulls >= 2 or cows >= 3 or bulls + cows == 4:
            answer = cheat()
            print(answer)
        bulls, cows = cows_bulls(attempt, answer)
        history.append([attempt, bulls, cows])
        print(cows, 'коровы, ', bulls, 'быка.')
    print('Вы выиграли!')

def cheat():
    error = True
    new_answer = None
    while error:
        new_answer = generate_answer()
        if new_answer == answer:
            error = True
            break
        else:
            if history:
                for i in history:
                    if cows_bulls(i[0], new_answer) != [i[1], i[2]]:
                        error = True
                        break
                    else:
                        error = False
            else:
                error = False
    return new_answer