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title: how to check if a string contains a word in python
introduction:
in python, checking if a string contains a specific word is a common task. there are multiple ways to achieve this, and in this tutorial, we'll explore some of the most straightforward and effective methods with code examples.
method 1: using the in keyword:
the simplest way to check if a string contains a word is by using the in keyword. this method is case-sensitive, meaning it distinguishes between uppercase and lowercase letters.
method 2: using the str.find() method:
the str.find() method returns the index of the first occurrence of a substring in a string. if the substring is not found, it returns -1. we can use this to check if the word exists in the string.
method 3: using regular expressions (regex):
regex provides a powerful way to match patterns in strings. the re module in python allows us to use regular expressions for more advanced string searching.
conclusion:
these are three common methods to check if a string contains a specific word in python. choose the method that best fits your needs based on simplicity, case-sensitivity, or the need for more advanced string matching using regular expressions.

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