Question

所以为了我的代码工作，我需要能够在for循环中放置一个for循环。对于我的项目，我试图找到所有以字母表中的字母开头的单词。我没有提出如何存储数据所以请批评我，因为我稍后会这样做。继承我的代码

$json = $res->getBody();
$array = json_decode($json);

dump($array);

Answer 1

如果您希望列表中的所有单词都是字母表中的第一个字母：

wordfile = open('/usr/share/dict/words','r')
words = wordfile.read()
wordlist = words.split()
alphabet=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

alphabet_words = []
for word in wordlist:
    if word[0] in alphabet:
        alphabet_words.append(word)

无论如何，你可以使用comprehension lists允许你在这个格式的相同代码下面内联简单循环：

wordfile = open('/usr/share/dict/words','r')
words = wordfile.read()
wordlist = words.split()
alphabet=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

alphabet_words = [word for word in wordlist if word[0] in alphabet]

Answer 2

您可以使用正则表达式，例如查找只包含字母，没有数字的字符串，您可以使用[a-zA-Z] +

https://docs.python.org/3/library/re.html

没有循环; - ）

我可以在for循环中放入一个for循环吗？

2 个答案: