Question

我正在尝试在word_counter函数中调用cleanse函数，我对如何操作感到困惑。

这个程序如何工作是一个字符串经过cleanse函数，删除了removed_characters中字符串的所有内容，然后是小写的。从那里，我需要在word_counter中“调用”已清理的消息，但这是我被困住的地方。我在下面尝试过。

 #how to call this function?
 def cleanse(message):
     cleansed_message = ''  
     remove_characters = "+-=[]"    
     for i in message:
          if i not in remove_characters:
               cleansed_message = cleansed_message + i
          cleansed_message = cleansed_message.lower()
     return cleansed_message

 def word_counter(message):
      # I tried calling the cleansed message here
      message = cleanse(message)
      count = 0
      for i in message:     
           count = len(message.split()) 
      return count

Answer 1

 def word_counter(message):
      message = cleanse(message)
      count = 0
      for i in message:     
           count = len(message.split()) 
      return count

只需将message = cleanse(message)放在函数定义的顶部（或至少在return count之前）。您的函数将在返回值时退出，因此之后的所有代码都不会被执行。（请注意，此规则有一些例外情况，但出于您的目的，可以安全地将其视为这样。）然后只需在程序正文中调用word_counter，就像这样：

print(word_counter("This is my super awesome message!"))

祝你好运！

Answer 2

def cleanse(message):
    cleansed_message = ''  
    remove_characters = "+-=[]"    
    for i in message:
        if i not in remove_characters:
            cleansed_message = cleansed_message + i
            cleansed_message = cleansed_message.lower()
    return cleansed_message


def word_counter(message):

    message = cleanse(message)
    print(message)
    count = 0
    for i in message:     
        count = len(message.split()) 
    return count

if __name__ == "__main__":
    msg = "Hello + Hye = Hello Hey. Your string has unnecessary characters - so please remove them"
    print(word_counter(msg))

评论：

使用消息字符串调用word_counter，如下所示：

if __name__ == "__main__":
    msg = "Hello + Hye = Hello Hey. Your string has unnecessary characters - so please remove them"
    print(word_counter(msg))

因为word_counter是一个函数，它将消息作为参数，然后将该消息传递给cleanse函数以清除不必要的字符，将过滤后的输出返回到word_counter，在那里计算字符串中的单词数并返回计入调用函数。

输出

msg = "Hello + Hye = Hello Hey. Your string has unnecessary characters - so please remove them"
    print(word_counter(msg))

在另一个函数中调用函数

2 个答案: