是否可以使用任何语句再次运行代码？

Question

import random
import sys


print("Password Generator")    
print("* Attention: - You may not generate a password with more than 70 characters\n"
      "             - You may not enter letters")

characters = "abcdefghijklmnopqrstuvwxyz" \
             "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*"
pass_length = input("Enter your password length: ")

在这里，我只想确保用户输入是数字而不是字母的信息！

if pass_length.isnumeric() is False:
    sys.exit("Natural numbers only!")

是否有一个语句可以在激活上面的“ if”语句之后自动运行脚本？

 def password_gen_start():
        password = "".join(random.sample(characters, int(pass_length)))
        print("Your password has been generated: " + format(password))


if int(pass_length) >= 71 and pass_length.isnumeric() is True:
    sys.exit("Password cannot be longer than 70 characters!")

if int(pass_length) < 71 and pass_length.isnumeric() is True:
    password_gen_start()

Answer 1

您只需要在一段时间内将其放置：

stop = ""
while stop != "yes":
    pass_length = input("Enter your password length: ")
    while not pass_length.isnumeric():
        pass_length = input("Natural numbers only !\n Enter your password length: ")
    # you put here the stuff that you want to execute
    stop=input("do you want to stop ?")

Answer 2

谢谢Nicolas，现在我终于可以完成我的代码：

import random

print("Password Generator")
print("* Attention: - You may not generate a password with more than 70 characters\n"
          "             - You may not enter letters")
characters = "abcdefghijklmnopqrstuvwxyz" \
             "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*"
pass_length = input("Enter your password length: ")
while not pass_length.isnumeric() or int(pass_length) >= 71:
    pass_length = input("Natural numbers no larger than 70 only !\nEnter your password length: ")

def password_gen_start():
    password = "".join(random.sample(characters, int(pass_length)))
    print("Your password has been generated: " + format(password))

if int(pass_length) < 71 and pass_length.isnumeric() is True:
    password_gen_start()