Question

我已经在stackoverflow的现有答案中搜索了这个问题的解决方案，并且无法解决我的问题。

我想迭代字符串＆＃34;引用＆＃34;并将每个单词存储在占位符变量字中，如果第一个字母大于或等于h则打印单词，并在空格处移动到下一个单词。

然而，在迭代最后一个单词之前，我的循环似乎停止了。有人能帮助我理解为什么吗？

quote = "Wheresoever you go, go with all your heart"
word = ""

for letter in quote:
  if letter.isalpha() == True:
    word = word + letter
  else:
    if word.lower() >= "h":
        print(word.upper()) 
        word = ""
    else:
        word = ""

我得到的输出是：

WHERESOEVER
YOU
WITH
YOUR

我想要的输出是：

WHERESOEVER
YOU
WITH
YOUR
HEART

Answer 1

您只能在遇到非字母字符后打印该单词。完成字符串循环后，还需要打印它。

Answer 2

如果你迭代单词而不是每个字符，并且只是将结果累积到新列表中，这将会更加简单。

quote = "Wheresoever you go, go with all your heart"

new_quote = " ".join([word.upper() for word in quote.split() if word.lower() >= "h"])

Answer 3

用于解释的代码内注释：

quote = "Wheresoever you go, go with all your heart"
word = ""
sentence = "" # use this to accumulat the correct words    

for letter in quote+"1": 
    # I add a non alpha to your quote to ensure the last word is used or discarded as well
    if letter.isalpha() == True:
        word = word + letter
    else:
        if word.lower() >= "h":
            sentence += word.upper() + " " # add word to sentence you want
            word = "" 
        else: 
            word = "" # discard the word, not starting with h

print (sentence)

适用于2.6和3.5。

输出：只读@bash：不管你的心脏什么

Answer 4

使用以下代码：

WHERESOEVER YOU WITH YOUR HEART

结果：

and

Answer 5

使用此代码几乎相同。

quote = "Wheresoever you go, go with all your heart"
word = ""
quote += " "
for letter in quote:
  if letter.isalpha() == True:
    word = word + letter
  else:
    if word.lower() >= "h":
        print(word.upper()) 
        word = ""
    else:
        word = ""

问题是引号中的最后一个字符是't'（字母数字）。

Python for循环在字符串

5 个答案: