find list of strings in list of strings, return boolean

问题

I am trying to work with lists of strings in python and somehow I can't find a good solution. I want to find a list of strings within a list of strings and return boolean values:

import re
sentences = ['Hello, how are you?',
             'I am fine, how are you?',
             'I am fine too, thanks']
bits = ['hello', 'thanks']

re.findall(sentences, bits)

# desired output: [True, False, True]

So I want to get an array of booleans with True, if the sentences string contains one or more of the bits. I also tried

bits = r'hello|thanks'

but I always get the error 'unhashable type: 'list''. I tried converting the lists to arrays, but then the error just says 'unhashable type: 'list''. I would be grateful for any help!

回答1:

One option is to use a nested list comprehension:

sentences = ['Hello, how are you?',
             'I am fine, how are you?',
             'I am fine too, thanks']
bits = ['hello', 'thanks']

[any(b in s.lower() for b in bits) for s in sentences]
# returns:
[True, False, True]

If you want to use a regular expression, you need to join bits with a pipe character, but you will still need to check each sentence in sentences individually.

[bool(re.search('|'.join(bits), s, re.IGNORECASE)) for s in sentences]
# returns:
[True, False, True]

来源：https://stackoverflow.com/questions/55443169/find-list-of-strings-in-list-of-strings-return-boolean