Question

我无法阻止它重复自己我不知道我哪里出错了，我已经问过如何正确循环但是我找不到如何。

pwok = 0
print ("You password must contain lower case and uppcase characters")
print ("It should also contain numbers as well")
pw = input("Please enter a password to test: ")
while pwok != 1:
     caps = sum(1 for c in pw if c.isupper())
     lower = sum(1 for c in pw if c.islower())
     nums = sum(1 for c in pw if c.isnumeric())

      scr = ['weak', 'medium', 'strong']
      r = [caps, lower, nums]


     if len(pw) < 6:
        print("This password is too short please Re-Enter another password") 
     elif len(pw) > 12:
        print("This password is too long please Re-Enter another password")
     else:
          pwok = 1

if caps >= 1:
     if lower >= 1:
          if nums >= 1:
               print(scr[1])
          elif nums < 1:
               print("your password is " + scr[1])
     elif lower < 1:
          print("your password strength is " + scr[1])
elif caps < 1:
     print("your password strength is " + scr[1])
if caps < 1:
     if lower < 1:
          if nums <1:
              print(scr[3])

Answer 1

问题是您再也没有读过密码。因此，如果密码第一次失败，您将永远陷入while循环。您应该在while循环中读取密码：

while pwok != 1:
    pw = input("Please enter a password to test: ")
    ...

Answer 2

您需要在循环内移动输入。如果len太短或太长，请在检查密码len后使用continue返回循环的开头。

如果不在循环中使用继续和移动输入，如果密码太长或太短，它将永远循环，所有行都将执行if the len pw < 6 or > 12。

pwok = 0
print ("You password must contain lower case and uppcase characters")
print ("It should also contain numbers as well")

while True:
    pw = input("Please enter a password to test: ")
    if pwok ==1:
        break
    caps = sum(1 for c in pw if c.isupper())
    lower = sum(1 for c in pw if c.islower())
    nums = sum(1 for c in pw if c.isnumeric())

    scr = ['weak', 'medium', 'strong']
    r = [caps, lower, nums]


    if len(pw) < 6:
        print("This password is too short please Re-Enter another password")
        continue # if you don't use continue all lines will be executed even if len < 6
    elif len(pw) > 12:
        print("This password is too long please Re-Enter another password")
        continue  # if you don't use continue all lines will be executed even if len > 12

    else:
        pwok = 1

    if caps >= 1:
         if lower >= 1:
              if nums >= 1:
                   print(scr[1])
              elif nums < 1:
                   print("your password is " + scr[1])
         elif lower < 1:
              print("your password strength is " + scr[1])
    elif caps < 1:
         print("your password strength is " + scr[1])
    if caps < 1:
         if lower < 1:
              if nums <1:
                  print(scr[3])

Answer 3

import re
pwok = 0
print ("You password must contain lower case and uppcase characters")
print ("It should also contain numbers as well")

while pwok != 1:
    pw = raw_input("Please enter a password to test:")
    caps = sum(1 for c in pw if c.isupper())
    lower = sum(1 for c in pw if c.islower())
    nums = len(re.search(r'\d+', pw).group())
    scr = ['weak', 'medium', 'strong']
    r = [caps, lower, nums]


    if len(pw) < 6:
        print("This password is too short please Re-Enter another password") 
    elif len(pw) > 12:
        print("This password is too long please Re-Enter another password")
    else:
          pwok = 1

if caps >= 1:
    if lower >= 1:
        if nums >= 1:
               print(scr[1])
        elif nums < 1:
               print("your password is " + scr[1])
    elif lower < 1:
          print("your password strength is " + scr[1])
elif caps < 1:
     print("your password strength is " + scr[1])
if caps < 1:
     if lower < 1:
          if nums <1:
              print(scr[3])

我如何在python中循环这个程序？

3 个答案: