CODEWITHSUNDEEP
pythonregexlist
supermario
supermario

Reputation: 2765

How to find regexp patterns in a Python list?

I have a list of bad word. Let's say it is:

BAD_WORDS = ['bw1', 'bw2',...]

Now I'm wondering what is the most efficient way to check a long string (aka a django request post) in a code like:

if re.search(comment.body) in BAD_WORDS:        
        dosomething;

Upvotes: 0

Views: 74

Answers (2)

Ashwini Chaudhary
Ashwini Chaudhary

Reputation: 251166

You can use any for this.

To match only the substring not exact word you can use the in operator:

if any(word in comment.body for word in BAD_WORDS):
    #do something

To match exact word use regex:

import re
if any(re.search(r'\b{}\b'.format(re.escape(word)), comment.body)
                                                            for word in BAD_WORDS):
    #do something

Upvotes: 1

Joel Cornett
Joel Cornett

Reputation: 24788

The best way is to use one expression for all the bad words:

import re
bad_words = ['bw1', 'bw2', ... ]

my_expression = '|'.join(re.escape(word) for word in bad_words)
if re.search(my_expression, comment.body):
    do_something()

Upvotes: 2

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