在Python中将字符串转换为标题大小写

标题大小写是一种写作风格，用于文章、书籍、电影和其他作品的标题。标题大小写的规则是：

1) 始终将第一个单词大写。
2) 将除以下词性外的所有单词大写：

• 文章 – a, an, the
• 并列连词——and, but, for, nor, or, so, yet
• 短介词 – to, in, up, from 等

例子：

Input : The quick brown fox jumps over the lazy dog.
Output : The Quick Brown Fox Jumps over the Lazy Dog.

Input : A tale of two cities
Output : A Tale of Two Cities

算法 ：

1. 列出所有必须小写的单词。
2. 对于输入中的每个单词，检查它是否在上面的列表中。
3. 如果是，则忽略该单词，如果不是，则将其第一个字符大写。

上述算法的实现是：

# Function to convert into title case
def generateTitleCase(input_string):
      
    # list of articles
    articles = ["a", "an", "the"]
      
    # list of coordinating conjunctins
    conjunctions = ["and", "but",
                    "for", "nor",
                    "or", "so",
                    "yet"]
      
    # list of some short articles
    prepositions = ["in", "to", "for", 
                    "with", "on", "at",
                    "from", "by", "about",
                    "as", "into", "like",
                    "through", "after", "over",
                    "between", "out", "against", 
                    "during", "without", "before",
                    "under", "around", "among",
                    "of"]
      
    # merging the 3 lists
    lower_case = articles + conjunctions + prepositions
      
    # variable declaration for the output text 
    output_string = ""
      
    # separating each word in the string
    input_list = input_string.split(" ")
      
    # checking each word
    for word in input_list:
          
        # if the word exists in the list
        # then no need to capitalize it
        if word in lower_case:
            output_string += word + " "
              
        # if the word does not exists in
        # the list, then capitalize it
        else:
            temp = word.title()
            output_string += temp + " "
              
      
    return output_string
  
# Driver code  
if __name__=='__main__':  
    input_text1 = "The quick brown fox jumps over the lazy dog."
    input_text2 = "A tale of two cities"
      
    print(generateTitleCase(input_text1)) 
    print(generateTitleCase(input_text2)) 

输出 ：

The Quick Brown Fox Jumps over the Lazy Dog. 
A Tale of Two Cities