:param x: list #1 :param y: list #2 :return: list of unique values """ # Validate both lists, confirm either are empty if len(x) == 0 and len(y) > 0: return y # All y values are unique if x is empty elif len(y) == 0 and len(x) > 0: return x # All x values are unique if y is empty # Get the input type to convert back to before return try: input The 2 top voted answers did not work for me, I'm not sure why (but I have integer lists). In the end I'm doing this: unique_values = [list (x) for x in set (tuple (x) for x in aList)] Try to this. array = [ ['a','b'], ['a', 'b','c'], ['a']] res= () for item in array: res = list (set (res) | set (item)) print res. Nov 29, 2015 · Lists aren't very numpy anyway, so maybe a tuple of lists is good enough for you. You can get that easily and rather efficiently with an iterator expression: fiveLists = tuple([] for _ in range(5)) You can leave out the tuple if you only need it once (gives you the raw iterator). You can use this to create a numpy array if you really want to: Nov 8, 2023 · Types of lists. Choose one of the following list styles. The following table includes common ways to present lists in our documentation: A sequence of steps to be performed in order. The following is an example of a numbered list: Open the box. Remove the bobcat from the box. Feed the bobcat. From the Lists app in Microsoft 365, select +New list . (To get to the Lists app, at the top of any page, select the Microsoft 365 app launcher , select All apps, and then select Lists .) From your SharePoint site home page or the Site contents page, select + New > List . From the Create a list page, select one of the following options: Mar 18, 2018 · If one prefers a list of lists, rather than a list of tuples from a flat list, then one could do this: a = range(20) # sample starting list b = [] # new list c = [] # alternate new list # ny is length of new list. nx length of each list within it nx = 5; ny = 4 bb = 0; ee = bb + nx # option one: sliding indeces for slices. Jan 17, 2012 · First, find the length of the longest row. maxlen = max ( [len (row) for row in yourlist]) Then pad each row by necessary number of strings: for row in yourlist: row += ['' for i in range (maxlen - len (row))] Then you can interchange the rows and columns i.e. columns should be rows and vice versa. Dec 7, 2023 · The function is called with a lambda function and a list and a n ew reduced result is returned. This performs a repetitive operation over the pairs of the list. Example : In this example the below code uses Python’s `functools.reduce` with a lambda function to multiply all values in lists `[1, 2, 3]` and `[3, 2, 4]`. The results, 6 and 24 Jun 4, 2022 · You can then iterate over the list of lists using the syntax below: colors_list = [ ['blue', 'green', 'yellow'], ['black', 'purple', 'orange'], ['red', 'white', 'brown'] ] for x in colors_list: for y in x: print (y) Here is the result: blue green yellow black purple orange red white brown. Let’s now add the string ‘ _color ‘ at the end of Nov 23, 2017 · And write a program that returns a list that contains only the elements that are common between the lists (without duplicates). Make sure your program works on two lists of different sizes. Here's my code: kuFuJ5.