Some important things to note about the .rfind() method: Lets see how we can use the .rfind() method to find the index of the last substring of a string in Python: We can see here that the method returned the index position of 27. splitlines. Why do we use Python String rfind() function? - Toppr Python has two very similar methods: .rfind() and .rindex(). The rfind() is a case sensitive method, "Scaler" and "scaler" are two different words for it. The two methods do exactly the same thing, with one notable difference: the .rfind () method will not fail is a given substring doesn't exist, while the .rindex () method will raise a ValueError. A Computer Science portal for geeks. The string rfind() method is very similar to the string rindex() method, both of them return the index of the last occurrence of a substring in the given string, the only difference between them is, when the substring is not found in the given string, the rfind() method will return -1, whereas the rindex() method will raise an error. Before starting with the differences lets discuss find() and index() methods in Python. The .find() method searches for a substring in a string and returns its index. Am I misinterpreting these functions or not using them well? I guess I'll have to add the length of my search term to get that index. So in this case, thats True. As we can see in the given string, the substring "cream" is present at indices 3, 14, 29, and 39. 03:04 01:56 Want to learn how to use the Python zip() function to iterate over two lists? It would find it at index 0. 00:09 "ab c ab".find ("ab") would be 0, because the leftmost occurrence is on the left end. Python. In Python, to find the index of a substring in a string can be located by python's in-built function using find () or index (). Python rindex () built-in function is used to return the highest index value of the last occurrence of the substring from the input string, if the substring is found. Difference between find () and index () in Python If a substring is not found in a string find () returns -1 whereas index () raises ValueError exception. Thanks again. .index() returns the lowest index but raises a ValueError when the substrings not found.
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