CODEWITHSUNDEEP
pythonstring
tkbx
tkbx

Reputation: 16275

Properly check if word is in string?

Say, for example, I want to check if the word test is in a string. Normally, I'd just:

if 'test' in theString

But I want to make sure it's the actual word, not just the string. For example, test in "It was detestable" would yield a false positive. I could check to make sure it contains (\s)test(\s) (spaces before and after), but than "...prepare for the test!" would yield a false negative. It seems my only other option is this:

if ' test ' in theString or ' test.' in theString or ' test!' in theString or.....

Is there a way to do this properly, something like if 'test'.asword in theString?

Upvotes: 3

Views: 200

Answers (1)

Danica
Danica

Reputation: 28846

import re
if re.search(r'\btest\b', theString):
    pass

This will look for word boundaries on either end of test. From the docs, \b:

Matches the empty string, but only at the beginning or end of a word. A word is defined as a sequence of alphanumeric or underscore characters, so the end of a word is indicated by whitespace or a non-alphanumeric, non-underscore character.

Upvotes: 10

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