Column-wise sum of nested list Question: Is there a more pythonic or more simple way to accomplish this? I am taking the column-wise sum of items in a nested list. I have a working example but I’m sure nested loops are not the way to do. There has to be something, maybe in NumPy or …
having trouble with appending in nested lists in python Question: I am having trouble with appending to a nested list in python. It keeps giving me a final list with double the list size it should be. When I loop through the second loop the first time it gives me an list with eleven elements …
How to merge the elements of nested list with changing inside elements? Question: I have a nested list. Two of inside elements can be a same, one is different. I need to change that list in some way that better to demonstrate. before = [[‘a’,’a’, 1],[‘a’,’a’, 2], [‘a’,’b’, 6], [‘a’,’b’, 0], [‘a’,’c’,5] #after some changes …
Padding lists inside nested list to make all of uniform length Question: I am trying to solve a problem that given a nested list containing lists of variable size, create a nested list that contains lists of uniform length equal to the maximum length among the lists inside the given nested list. Append empty strings …
Create nested list from another list based on byte size check to dynamically incremented nested list name Question: I have a list filled with paragraph tags (<p></p>) content from a site using beautifulsoup4. I would like to break that list into a nested list with the sublists name being dynamically incremented and have this incrementation …
Space Complexity with no variables defined Question: Suppose I had some code: def foo(forest: list[list[int]]) -> int: return sum([1 for tree in forest for leaf in tree]) In this code, no variables are defined. Everything is evaluated in one line, which means to my knowledge the data isn’t being stored anywhere. Does that mean this …
Filter a Python list using Dictionary keys and values Question: GOAL: Filter a list of lists using dictionary as reference in Python 3.8+ CASE USE: When reviewing a nested list — a series of survey responses — filtering out responses based on control questions. In the dictionary, the responses to questions 3 (index 2 in …
convert list of lists in dataframe Question: I have a following data 0 [[-0.932, 2.443, -1…. 1 [[-1.099, 2.140, -1.4… 2 [[-0.985, -1.654, -1…. 3 [[-1.339, 2.070, -0…. 4 [[-1.119, 2.788, -2…. … 494 [[-0.023, 2.688, -1… 495 [[1.897, 0.0, -2.249,… 496 [[1.538, 2.349, -0.6… 497 [[-0.141, 2.320, -0… 498 [[-0.483, 1.587, -1…. Length: 499, …
Sort by order of another list, where that list is nested with 2 sort keys, using Python Question: I know how to sort one list to match the order of another list. I also know how to sort one list on two keys (using a lamdba function like key = lambda i: (i[0], i[1])). But …
How to transpose a list of lists? Question: Let ll be a list of lists, and tt a tuple of tuples Input: ll = [["a1","a2"],["b1","b2"],["c1","c2"]] Desired output: tt = (("a1","b1","c1"),("a2","b2","c2")) I have managed to solve it for a list of two-element lists, meaning that the internal list only contained two elements each. def list_of_list_to_tuple_of_tuple(ll): first_elements …
