In this tutorial, you'll learn the best way to check whether a Python string contains a substring. You'll also learn about idiomatic ways to inspect the substring further, match substrings with conditions using …

Dec 20, 2025 · The operator.contains () function checks for substring presence in a string programmatically. It provides the same result as the in operator but belongs to Python’s operator …

Aug 9, 2010 · Other languages may have no methods to directly test for substrings, and so you would have to use these types of methods, but with Python, it is much more efficient to use the in …

Mar 22, 2025 · The concept behind string.contains() is simple: it checks whether a given substring is present within a larger string. If the substring is found, it returns a boolean value (True or False), …

Feb 24, 2025 · Learn how to check if one string contains another in Python using in, find (), and regular expressions. Explore common pitfalls, and efficient practices.

May 9, 2023 · Python's strings have an index method and a find method that can look for substrings. Folks new to Python often reach for these methods when checking for substrings, but there's an …

Feb 11, 2026 · Learn every way to check if a Python string contains a substring: in operator, find (), index (), count (), case-insensitive search, and regex. With examples.

Nov 7, 2025 · The ability to check if a Python string contains a substring, character, or multiple substrings is fundamental in programming. Python provides multiple ways to achieve this, from the …

Aug 29, 2025 · Checking if a string contains a substring is one of the most fundamental operations in Python programming. Whether you’re validating user input, parsing text data, or building search …

Apr 27, 2023 · This article will show you the various built-in functions to check if a string contains a substring in Python. The main function that is our main focus for this article is Python’s __contains__ …