在 python 中的字符串列表中找到确切的单词列表？

Question

我有两个字符串列表：

grids = ['north', 'eaSt', 'West','noRtheast', 'soUth']
links = ['north-northeast', 'north-south']

我想检查 links 中有什么 grids。所以我为此写了一个程序：

import re

grids = ['north', 'eaSt', 'West','noRtheast', 'soUth']
links = ['north-northeast', 'north-south']

for search in grids:
    for text in links:
        result = re.findall('\b' + search + '\b', text, flags=re.IGNORECASE)
        print(result)

输出：

['north']
['north']
[]
[]
[]
[]
['northeast']
[]
[]
['south']

我几乎得到了输出，但不明白为什么我在输出中得到那些空白，所以我可以得到更简单干净的替代品吗？

Answer 1

当常规 Exp 找不到任何内容时，您的代码打印结果也是如此。您可以添加一些 if 检查数组是否为空

import re

grids = ['north', 'eaSt', 'West','noRtheast', 'soUth']
links = ['north-northeast', 'north-south']

for search in grids:
    for text in links:
        result = re.findall('\b' + search + '\b', text, flags=re.IGNORECASE)
        if len(result):
            print(result)

Answer 2

可能不需要为此使用正则表达式。只需检查字符串是否存在。

grids = ['north', 'eaSt', 'West','noRtheast', 'soUth']
links = ['north-northeast', 'north-south']
for l in links:
    print(f'{l} contains {[x for x in grids if x.lower() in l.lower().split("-")]}')

输出

north-northeast contains ['north', 'noRtheast']
north-south contains ['north', 'soUth']

Answer 3

我不知道图书馆“re”，但我想我可以像这样解决你的问题：

grids = ['north', 'eaSt', 'West','noRtheast', 'soUth']
links = ['north-northeast', 'north-south']

for search in grids:
    for text in links:
        if search.lower() in text.lower():
            print('find '+search+' in '+text+' !') 
</pre>
字符串上的方法 .lower() 会将所有基于大小写的字符小写，如果字符串 search 在字符串 text.

Answer 4

好吧，我有误会，你可以在比较之前拆分链：

grids = ['north', 'eaSt', 'West','noRtheast', 'soUth']
links = ['north-northeast', 'north-south']

for search in grids:
    for text in links:
        for text_split in text.split('-'):
            if search.lower() == text_split.lower():
                print('find '+search+' in '+text+' !')</pre>
输出：
find north in north-northeast !
find north in north-south !
find noRtheast in north-northeast !
find soUth in north-south !</pre>

在 python 中的字符串列表中找到确切的单词列表？

find the exact list of words in list of strings in python?

python

string

python-re