Python猜数字编程 运行成功了 但不知道数字怎么填

def guess_num():
n = random.randint(50, 100000)
target_num = random.randint(1, n)
error_num = []
for i in range(6):
str = ""
if i == 0:
str = "你猜一猜看是什么数："
else:
str = "你再猜："
guessNum = int(input(str))
if guessNum == target_num:
print("congratulation,you're right")
return guessNum
else:
error_num.append(guessNum)
else:
print("you guess more than 6 times bye")
print("正确的数字是：", target_num)
print("六次猜的数字都有", error_num)

print(guess_num())