string contains python

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tutorial: string contains in python with code examples
in python, checking whether a string contains another string is a common operation. there are several ways to achieve this, and in this tutorial, we will explore different methods to check if a string contains another string.
the simplest way to check if a string contains another string is by using the in keyword. this method returns a boolean value, indicating whether the substring is present in the main string.
the str.find() method returns the lowest index of the substring if it is found in the main string. if the substring is not found, it returns -1. this method is useful if you need the index of the first occurrence of the substring.
regular expressions offer powerful pattern-matching capabilities. the re module in python can be used for more complex string matching.

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