I need all permutations of a bool array, the following code is inefficient, but does what I want: However it is inefficient and fails for long arrays. Is there a more efficent implementation? Answer What about sampling the combinations of indices of the True values: Output:
Tag: python-itertools
Python Pandas combinations to build the best team
I can’t simplify my data so I put them entirely. I would like to build the best possible team of 11 players according to the “niveau” column. Each “id” has a “niveau” note for the “statut” column. I think it would be necessary to test all the possible comb…
how to make this javascript for-loop converted to python code with same or faster execution time?
Please help to optimize my python code, I wrote this JS code and tried to convert it to python that I need the execution time comparable to the original code. The original code follows for-loop in JS, I transferred the code literally by using pure python and numpy but I didn’t optimize it well resulting…
How to get pairwise iterator with last element as being the first
I am using the following function pairwise to get the iteration of ordered pairs. For example, if the iterable is a list [1, 2, 3, 4, 5, 6] then I want to get (1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 1). If I use the following function then it returns (1, 2), (2, 3), (3, 4),
Print all possible combination of words of length 10 from a list letters with repeating ‘A’ exactly twice
I have a list of 5 letters [‘A’, ‘B’, ‘N’, ‘M’,’E’]. I want to print all the words (word means a sequence of letters, it doesn’t have to be a valid English word) of length 10 letters that have exactly two letters A. Order is important. I have t…
Python: How to pass output of the map function as arguments
I need to pass some arguments to the starmap_async function. I have a list my_list that has different values in it and some constants that are repeated. I have a way to pass the arguments as bellow: It works and generates arguments like this which is the desired output: Now I want to use the map function to d…
Using a column of values to create a counter for a variable sequential number column
I currently have a pandas dataframe with some columns. I’m looking to build a column, Sequential, that lists what iteration is recorded at that part of the cycle. I’m currently doing this using itertools.cycle, and a fixed number of iterations block_cycles, like so: With an output like this: And t…
Detecting cheapest way to build independent iterators
Suppose I’m writing a function taking in an iterable, and my function wants to be agnostic as to whether that iterable is actually an iterator yet or not. (This is a common situation, right? I think basically all the itertools functions are written this way. Take in an iterable, return an iterator.) If …
Mapping complex JSON to Pandas Dataframe
BackgroundI have a complex nested JSON object, which I am trying to unpack into a pandas df in a very specific way. JSON Objectthis is an extract, containing randomized data of the JSON object, which shows examples of the hierarchy (inc. children) for 1x family (i.e. ‘Falconer Family’), however th…
Permutations with repetition given a number of dices
I was looking for a solution on Internet, but could not find an answer, mostly due to my poor English (I could not ask a correct question). I need to generate a list of all possible permutations (combinations) of dices given a number of dices. For example, 2 dices should give me the following list: I was thin…