How to Find Index of Item in Python List Last Updated : 26 Dec, 2024 Comments Improve Suggest changes Like Article Like Report To find the index of given list item in Python, we have multiple methods depending on specific use case. Whether we’re checking for membership, updating an item or extracting information, knowing how to get an index is fundamental. Using index() method is the simplest method to find index of list item. Using index()index() method returns the index of first occurrence of a specified value. If the item is not found, it raises a ValueError.Example: Python a = [10, 20, 30, 40, 50] # Find index of item 30 res = a.index(30) print(res) Output2 Note: To handle a ValueError, we can use a try-except block. This prevents the program from crashing when the item is not found.Let's explore other methods to find the index in a Python list.Table of ContentUsing enumerate() Using for LoopUsing enumerate() If we want to find the index of an item while iterating over the list, we can use enumerate() function. This is helpful when we are searching for an item during iteration.Example: Python a = [10, 20, 30, 40, 50] # `i` is the index, `val` is the value at that index res = [i for i, val in enumerate(a) if val == 30] print(res) Output[2] Using for LoopWithin each iteration, we check if the current element is equal to the specified item. If a match is found, we print found index and exit the loop using the break statement. Example: Python a = [10, 20, 30, 40, 50] item = 30 # element to find # looping the list for i in range(len(a)): if a[i] == item: print(i) break # found Output2 Comment More infoAdvertise with us Next Article How to Find Index of Item in Python List A anjalibo6rb0 Follow Improve Article Tags : Python Python Programs python-list Python list-programs How To +1 More Practice Tags : pythonpython-list Similar Reads Python Tutorial | Learn Python Programming Language Python Tutorial â Python is one of the most popular programming languages. Itâs simple to use, packed with features and supported by a wide range of libraries and frameworks. 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