CODEWITHSUNDEEP
pythonlistsearchcpu-word
Pythoner
Pythoner

Reputation: 640

How to search for a keyword in a list of strings, and return that string?

I have a list of strings that are a few words long, and I need to search for two keywords, and return the strings that contain those two key words.

I have tried to loop through the strings, but was not able to do so. I tried the .find() function but that was not successful on a list of strings.

Lets say we have a list:

list = ["The man walked the dog", "The lady walked the dog","Dogs 
are cool", "Cats are interesting creatures", "Cats and Dogs was an 
interesting movie", "The man has a brown dog"]

I would like to iterate through the list of strings and return the strings in a new list that contain both the words "man" and "dog". Ideally, to get the following:

list_new = ["The man walked the dog", "The man has a brown dog"]

Upvotes: 3

Views: 12025

Answers (3)

Lante Dellarovere
Lante Dellarovere

Reputation: 1858

I would use a regex to avoid matchings with words like manifold or dogma:

import re

l = [
    "The man walked the dog", 
    "The lady walked the dog", 
    "Dogs are cool", 
    "Cats are interesting creatures",
    "Cats and Dogs was an interesting movie", 
    "The man has a brown dog",
    "the manner dogma"
]

words = ["man", "dog"]
results = [x for x in l if all(re.search("\\b{}\\b".format(w), x) for w in words)]
results

>>> ['The man walked the dog', 'The man has a brown dog']

Upvotes: 2

brunns
brunns

Reputation: 2764

Try this:

words = ["man", "dog"]
l = ["The man walked the dog", "The lady walked the dog","Dogs are cool", "Cats are interesting creatures", "Cats and Dogs was an interesting movie", "The man has a brown dog"]
new_list = [item for item in l if all((word in item) for word in words)]

gives

['The man walked the dog', 'The man has a brown dog']

(I didn't use the name list since that would mask the built-in type.)

Upvotes: 1

Arkistarvh Kltzuonstev
Arkistarvh Kltzuonstev

Reputation: 6920

Try this :

list_ = ["The man walked the dog", "The lady walked the dog","Dogs are cool", "Cats are interesting creatures", "Cats and Dogs was an interesting movie", "The man has a brown dog"]
l1 = [k for k in list_ if 'man' in k and 'dog' in k]

OUTPUT :

['The man walked the dog', 'The man has a brown dog']

Note : Refrain from assigning variable name as list.

Upvotes: 9

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