您需要跟踪它最后返回的值;您可以

• 使用一个全局模块来实现 （实际上通常很混乱），
• 或者把它变成一个类 （有点冗长），
• 或者在外部跟踪并每次传递它 （笨重而乏味），

但imo最好的方法是将wrong函数转换为generator：这样你就可以在生成器执行状态中跟踪最后一个返回值，并在下次避免它，而不必担心外部代码中的任何地方。

def wrong():
    wrong_stats = ["Wrong!","Tough Luck!","Better Luck Next Time!","Not there yet!","Incorrect!"]
    previous_value = None
    while True:
        value = random.choice(wrong_stats)
        if value != previous_value:
            yield value
            previous_value = value

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和用法：

w = wrong()
for i in range(5):
    print(next(w))

# Tough Luck!
# Incorrect!
# Not there yet!
# Tough Luck!
# Better Luck Next Time!

型
你可以继续使用生成器调用next，它将产生无限数量的字符串，而不会重复以前的值。

全局变量是一个糟糕的做法。
你应该把你最后打印的值传递给wrong，然后在除了那个值之外的所有值中进行选择。像这样：

import random

def wrong(last):
    chosen = random.choice([stat for stat in WRONG_STATS if stat != last])
    print(chosen)
    return chosen

if "__main__" == __name__:
    last = None
    for i in xrange(5):
        last = wrong(last)

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将前一个值存储在全局变量中，并从列表中随机选择（不包括前一个值）：

import random

wrong_stats=["\n Wrong!","\n Tough Luck!","\n Better Luck Next Time!","\n Not there yet!","\n Incorrect!"]
prev = ""

def wrong():
  global prev
  if prev == "":
    prev = random.choice(wrong_stats)
  else:
    prev = random.choice(wrong_stats[:wrong_stats.index(prev)] + wrong_stats[wrong_stats.index(prev)+1:])
  print prev
if __name__ == "__main__":
  wrong()
  wrong()
  wrong()
  wrong()
  wrong()

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使用random.shuffle：

from random import shuffle
>>> shuffle(wrong_stats)
>>> wrong_stats
['\n Better Luck Next Time!', '\n Wrong!', '\n Incorrect!', '\n Tough Luck!', '\n Not there yet!']
>>> shuffle(wrong_stats)
>>> wrong_stats
['\n Incorrect!', '\n Tough Luck!', '\n Better Luck Next Time!', '\n Not there yet!', '\n Wrong!']
>>> shuffle(wrong_stats)
>>> wrong_stats
['\n Incorrect!', '\n Wrong!', '\n Better Luck Next Time!', '\n Not there yet!', '\n Tough Luck!']
>>> shuffle(wrong_stats)
>>> wrong_stats
['\n Wrong!', '\n Incorrect!', '\n Better Luck Next Time!', '\n Tough Luck!', '\n Not there yet!']

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这里有另一个例子，可能会给你一个给予的想法：

import random 

country = ["Spain", "Sweden", "Netherlands", "Germany"]
lastcountry = ''
i = 0
while i <= 5:
    country = (random.choice(country))
    if (country != lastcountry):
        i = i + 1
        print (country)
    lastcountry = country

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它会记住最后选择的选项。
如果它做了一个新的选择，它会看它是否和以前的选择不一样。