##### Saving list in a list
 Saving list in a list quest_ Silly Frenchman Posts: 39 Threads: 11 Joined: Nov 2020 Reputation: Mar-08-2021, 01:44 PM Hello I am trying to save my list into another list. I actually do it but it is saved like `array([0, 0]), array([0, 1])`However I want to save like that: `[0,1],[0,0]...`my code is here: ```results_ = [] measurements = results.samples[0] # I could manage to get my list like [0,0] [1,1] print("measurements",measurements) # I am printing my measurements and it is ok they are coming like [0,0][1,1] results_.append(measurements) # I am adding to another list and here is the problem.they are coming : array([0, 0]),array([0, 1]) print("results",results_) sebep = sorted(results_) print(results_)```here is my output: ``````Output:measurements [1 1] measurements [0 1] measurements [0 0] measurements [0 1] measurements [0 0] measurements [1 1] measurements [0 1] measurements [0 1] results [array([1, 1]), array([0, 1]), array([0, 0]), array([0, 1]), array([0, 0]), array([1, 1]), array([0, 1])`````` Reply Larz60+ aetate et sapientia Posts: 10,521 Threads: 396 Joined: Sep 2016 Reputation: Mar-08-2021, 02:09 PM measurements is set from results (which is empty to begin with) then you try to append measurements back to results. Think about what you are doing here. Does it make sense? Reply Posts: 5,523 Threads: 112 Joined: Sep 2016 Reputation: Mar-08-2021, 02:41 PM (This post was last modified: Mar-08-2021, 02:48 PM by snippsat.) measurements is return a NumPy Array ```>>> import numpy as np >>> >>> n1 = np.array([0, 1]) >>> n1 array([0, 1]) >>> type(n1) ```So will work like a normal Python list,but you can convert. ```>>> import numpy as np >>> >>> n1 = np.array([0, 1]) >>> n2 = np.array([1, 2]) >>> lst = [] >>> # add list >>> lst.append(list(n1)) >>> lst.append(list(n2)) >>> lst [[0, 1], [1, 2]]```On a finish list. ```>>> import numpy as np >>> >>> n1 = np.array([0, 1]) >>> n2 = np.array([1, 2]) >>> lst = [] >>> lst.append(n1) >>> lst.append(n2) >>> lst [array([0, 1]), array([1, 2])] >>> >>> new_lst = [list(i) for i in lst] >>> new_lst [[0, 1], [1, 2]] ```If it's a NumPy Array with serval item use `.tolist`. ```>>> import numpy as np >>> >>> m = np.array([[0,1], [2,3]]) >>> m array([[0, 1], [2, 3]]) >>> m.tolist() [[0, 1], [2, 3]]``` quest_ likes this post Reply quest_ Silly Frenchman Posts: 39 Threads: 11 Joined: Nov 2020 Reputation: Mar-10-2021, 09:58 AM (Mar-08-2021, 02:41 PM)snippsat Wrote: measurements is return a NumPy Array ```>>> import numpy as np >>> >>> n1 = np.array([0, 1]) >>> n1 array([0, 1]) >>> type(n1) ```So will work like a normal Python list,but you can convert. ```>>> import numpy as np >>> >>> n1 = np.array([0, 1]) >>> n2 = np.array([1, 2]) >>> lst = [] >>> # add list >>> lst.append(list(n1)) >>> lst.append(list(n2)) >>> lst [[0, 1], [1, 2]]```On a finish list. ```>>> import numpy as np >>> >>> n1 = np.array([0, 1]) >>> n2 = np.array([1, 2]) >>> lst = [] >>> lst.append(n1) >>> lst.append(n2) >>> lst [array([0, 1]), array([1, 2])] >>> >>> new_lst = [list(i) for i in lst] >>> new_lst [[0, 1], [1, 2]] ```If it's a NumPy Array with serval item use `.tolist`. ```>>> import numpy as np >>> >>> m = np.array([[0,1], [2,3]]) >>> m array([[0, 1], [2, 3]]) >>> m.tolist() [[0, 1], [2, 3]]``` Thanks you very much Reply

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