How do you remove duplicates from a list whilst preserving order?

Question

Is there a built-in that removes duplicates from a list in Python, whilst preserving order? I know that I can use a set to remove duplicates, but that destroys the original order. I also know that I can roll my own like this: def uniq(input): output = [] for x in input: if x not in output: output.append(x) return output But I'd like to avail myself of a built-in or a more Pythonic idiom if possible. Select the correct answer from above options

Answer 1

There are many ways to remove duplicate from Python List some are:- We can remove duplicate from List using the more_iterable library. The iterable library comes under Python itertools module which is a collection of tools for handling iterators. iterators are data types that can be used in a for loop. The most common iterator in Python is the List. For installing this library you can run the following commands: (pip install more_itertools). from more_itertools import unique_everseen items = [1, 2, 0, 1, 3, 2] list(unique_everseen(items)) Another way we can solve this problem using the ordered_dict library. The dict subclass always remembers the entire order of any collection. from collections import OrderedDict items = [1, 2, 0, 1, 3, 2] list(OrderedDict.fromkeys(items))