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python string rindex itsmycode skip to content itsmycode home courses full stack web development front end web development ux ui immersive course digital marketing corporate training faqs blog contact us python string rindex october 19 2024 categories python string methods the python string rindex method is a built in function that returns the substring s highest index last occurrence in a given string if not found it raises valueerror substring not found exception syntax the syntax of rindex method is str rindex sub start end parameters the rindex method can take three parameters sub substring that needs to be searched in the given string start optional starting position where the substring needs to be searched within the string end optional ending position where the substring needs to be searched within the string note if the start and end indexes are not provided by default it takes 0 as the starting index and str length 1 as the end index return value the rindex method returns an integer value an index of a substring if the substring is found in the given string the rindex method will return the highest index of the substring if the substring is not found in the given string it throws valueerror substring not found exception difference between rindex method and rfind method the rindex method is similar to rfind method the only major difference is that the rfind method returns 1 if the substring is not found in a given string whereas the rindex method will raise the valueerror substring not found exception example 1 find the last occurrence of a string in python the index in python starts from 0 and not from 1 hence in the below example the last occurrence of the substring code is found at index position 25 text itsmycode learn how to code in python find the index of last occurence of substring output text rindex code print the index of last occurrence of code is output find the index of character output text rindex print the index of last occurrence of is output output the index of last occurrence of code is 25 the index of last occurrence of is 10 example 2 rindex method if the string is not found here the substring hello is not found in the given string and hence python interpreter raises valueerror substring not found exception text itsmycode learn how to code in python find the index of last occurence of substring output text index hello print the index of last occurrence of hello is output output traceback most recent call last file c personal ijs code main py line 4 in module output text index hello valueerror substring not found example 3 rindex method using start and end arguments text itsmycode code coder coders coding find the index of last occurence of substring code output text rindex code 18 print the index of last occurrence of code is output find the index of character output text rindex 8 20 print the index of last occurrence of is output find the index of substring de output text rindex de 10 6 print the index of last occurrence of de is output output the index of last occurrence of code is 25 the index of last occurrence of is 16 the index of last occurrence of de is 27 related posts python string index python string rfind how to check if string contains substring in python python list index attributeerror numpy ndarray object has no attribute index python typeerror str object is not callable solution search search popular post what it s like to be black in tech who learns to code part time at itsmycode what is conversational ux categories basics built in methods business c c career clojure date and time django erlang errors and exception files and folders git haskell health how to java javascript leadership list methods node js numpy pandas powershell python r ruby on rails rust scipy seaborn sitecore start up string methods technology tutorials ui ux design itsmycode start your career with premier training in programming software development web development ux ui digital marketing and more apply today quick links homepage job support careers blog about us contact us privacy policy cookie policy programs digital marketing course ux ui immersive course full stack web development course front end web development course corporate training contact us monday friday 8 00 a m 5 00 p m admin itsmycode com 2026 itsmycode all rights reserved