Multiple strings exist in another string : Python Python any() Function. Python has several methods to deal with strings. It is worth noting that you will get a boolean value (True or False) or an integer to indicate if the string contains what you searched for. Suppose you have a string “str” already defined, here’s how it will look like: … If it returns -1 that means the string does not contain that substring. 2) Use . Python all() method to check if the list exists in another list. Must Read: Python Book | Best Book to Learn Python in 2020. How to check if a string contains a substring in Python. You’ll know more about it as I show the code below. # Check if any string from the list exists in given string result = any(([True if subStr in mainStr else False for subStr in listOfstrs])) if result: print('A string from list Found in main String ') Output: A string from list Found in main String Elm Street): In that case, we might check which addresses contain the street name (e.g. It returns the lowest index in str where substring sub is found, otherwise returns -1 if sub is not found. contains with a regex pattern using OR (|): s[s.str.contains('og |at')] Output: 0 cat. The easiest way is via Python’s in operator.Let’s take a look at this example.As you can see, the in operator returns True when the substring exists in the string.Otherwise, it returns false.This method is very straightforward, clean, readable, and idiomatic. Python any() function accepts iterable (list, tuple, dictionary etc.) While working on a condition to check whether a string contained the special characters used in the glob.glob standard library function, I came up with the above code (with help from the OpenProjects IRC channel #python). If you have questions or suggestions, please let me know. In this example, we will take a source string, and a list of strings. 'in' operator is the most helpful in such case. This function returns the first index position where substring is found, else returns -1. The method find() checks whether a string contains a particular substring or … ; Parameters: A string or a … In this tutorial, I’ll show you how to know if a string contains a substring. As the item from list 'e' is present as substring in the source string, during the for loop execution for the element 'e', condition in if loop becomes True. The original string : There are 2 apples for 4 persons The original list : ['apples', 'oranges'] Does string contain any list element : True Attention geek! Here’s a small program to show it in action: __contains__() is another function to help you to check whether a string contains a particular letter/word. This code is case sensitive. Get All Matched Items in Python. Strengthen your foundations with the Python Programming Foundation Course and learn the basics. As we have Maruf in the string so we get the output as True. Let's say, we have a string that contains the following sentence: The brown-eyed man drives a brown car. Here’s how to do that: The reason behind the output is – this method returns the lowest index value when the substring is found. Check if string contains another string in Swift; How to check if a substring is contained in another string in Python; Check if a string is suffix of another in Python; Check if a string can be repeated to make another string in Python; Check if binary string multiple of 3 using DFA in Python; Check If a String Can Break Another String in C++ Python NameError: name 'string' is not defined, Example 1: Check if String contains Substring from List. in takes two "arguments", one on the left and one on the right, and returns True if the left argument is contained within the right argument. Suppose you have a string “str” already defined, here’s how it will look like: The output for this will be “True” because the string contains what I searched for. We will find all the non-overlapping matches of given substring in the string using re.findall() function. Using ‘in’ operator. If you find to utilize a search algorithm from scratch without using the functions or the above-mentioned solutions, you can take a look at some of the string search algorithms to explore more about them. The easiest way to check if a Python string contains a substring is to use the in operator. Using find() to check if a string contains another substring. We will use for loop, to check if the string from list is present as substring in source string. Use str. The first way to check if a string contains another string is to use the in syntax. In this tutorial of Python Examples, we learned how to check if string contains substring from a list of strings, with the help of example program. any will return True when at least one of the elements is Truthy. 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