Python 3 中的 While 循环问题 - 当它应该重复时循环中断 [重复]

Question

我目前正在开发一个用 Python 3.5 编写的 Yahtzee 游戏。我已经定义了一个函数，要求用户在检查是否正确之前输入将要玩的人的名字。

def get_player_names():

   while True:
      print("Who are playing today? ")

      players = [str(x) for x in input().split()]

      n = len(players)

      if n == 1:
          for p in players:
              print("So", p, "is playing alone today.")

          choice = input("Is this correct?(y/n)\n")

          if choice == "y" or "Y":
              break
          elif choice == "n" or "N":
              continue
          else:
              print("You should enter either y/Y or n/N")
              continue

      elif n > 1:
          print("So today, ", n, " people are playing, and their names are: ")

          for p in players:
              print(p)

          choice = input("Is this correct?(y/n)\n")

          if choice == "y" or "Y":
              break
          elif choice == "n" or "N":
              continue
          else:
              print("You should enter either y/Y or n/N")
              continue

      else:
          print("Sorry, but at least one person has to participate")
          continue

  placeholder()


def placeholder():
  print("KTITENS")

get_player_names()

程序创建没有问题的球员列表，以及当用户确认球员姓名正确时，循环中断并调用下一个函数。 （目前这只是一个打印 KITTENS 的函数。问题是，如果用户输入“n”/“N”或其他内容，我希望循环重复，但它会中断。

希望有人可以帮助我！抱歉，如果此问题重复，但我找不到有关 Python 3 的类似问题。

Answer 1

问题是那些行：

if choice == "y" or "Y":
    break
elif choice == "n" or "N":
    # Some stuff

应该是：

if choice == "y" or choice == "Y":
    break
elif choice == "n" or choice == "N":
    # Some stuff

确实，or "Y" 始终为真，因此始终调用 break。

您可以通过在 python 控制台中输入以下内容来检查：

>>> if 'randomstring': print('Yup, this is True')
Yup, this is True

Answer 2

改变

if choice == "y" or "Y":
          break
      elif choice == "n" or "N":
          continue

到

if choice == "y" or choice =="Y":
          break
      elif choice == "n" or choice =="N":
          continue

'Y' 是一个非空字符串，因此bool('Y') 始终是True

你可以在这里阅读Truth Value Testing