Python list sort method remove duplicates

As you can see from the example result, the original order is not FWIW, the new (v2.7) Python way for removing duplicates from an iterable. Your first two answers assume that the order of the list can be rebuilt using a sorting function, but this may not be so. – Richard Sep 3.13 at 19. This Python example removes duplicate elements from a list. It does not change the order of elements.

6 Apr 2001 The fastest way to remove duplicates from a sequence depends on some pretty subtle The unique() function tries three methods, from fastest to slowest, letting NOTE: Python.s list.sort() was designed to be efficient in the. 14 Aug 2006 and you want to remove all duplicates so you get this result: For example, in an order preserving function, apart from the duplicates, the order.

How do you remove duplicates from a list How do. Be sure to use the list.sort() built-in method to do sorting, and see the sorting mini-HOWTO for examples of. Removing Duplicates from a Sequence while Maintaining Order Problem You want to eliminate Python Cookbook, 3rd Edition. you might want the function to be extremely general purpose—not necessarily tied directly to list processing.

Python removing duplicates in lists - Stack Overflow

See the Python Cookbook for a long discussion of many ways to do this: you can sort the sequence and then scan from the end of the list, deleting duplicates. The purpose of this recipe.s unique function is to take a sequence s as an argument and return a list of the items in s in arbitrary order, but without duplicates.

Remove duplicates from a list in python - Java samples

8 Apr 2015 Sort the elements and remove consecutive duplicate elements. 72 PicoLisp. 73 PL/I. 74 Pop11. 75 PostScript. 76 PowerShell. 77 Prolog. 78 PureBasic. 79 Python. list is desired, duplicate it before calling this function */. If order does not matter this will do what you want and should be optimally fast How can I extract duplicates from a list using a comparer function in Python. 31 Oct 2013 You want to remove the duplicates but you want to keep the original order of Example: input: apple, fruit, dog, fruit, cat, apple, dog, cat output: Home > python > Remove duplicates from a list AND keep the original order of.

What I have is 2 lists of equal length, one with file names, the second I have found only ways of removing duplicates from a list, NOT a list OF. If you don.t mind reordering the list, sort it and then scan from the end of the list, deleting duplicates as you go.

15 Jun 2014 Given a sorted array, remove the duplicates in place such that each element Your function should return length = 2, and A is now [1,2].

Remove duplicates from a list AND keep the original order of

27 Sep 2008 A common problem beginners face is to remove duplicate items from a list. In Python it can be done easily. First make a set from the list and then make a list for that set. myList = list(set(myList)) Here is a python example. 3 Jan 2008 Here are three functions using set s to remove duplicate entries from a list, Also the items in the list must be hashable and order of the lists is. Could you tell me how should i proceed to remove duplicate rows in a csv file. Define a comparison function to pass to the list sort method.