create a tuple from pairs

Question

I would like to create a tuple which present all the possible pairs from two tuples

this is example for what I would like to receive :

first_tuple = (1, 2) second_tuple = (4, 5) mult_tuple(first_tuple, second_tuple) 

output :

((1, 4), (4, 1), (1, 5), (5, 1), (2, 4), (4, 2), (2, 5), (5, 2)) 

This is what I did which succeed however look a bit cumbersome :

def mult_tuple(tuple1, tuple2):     ls=[]     for t1 in tuple1:          for t2 in tuple2:             c=(t1,t2)             d=(t2,t1)             ls.append(c)             ls.append(d)      return tuple(ls)   first_tuple = (1, 2)  second_tuple = (4, 5)  mult_tuple(first_tuple, second_tuple)   

The code I wrote works , however I am looking for a nicer code
thank you in advance

Answer 1

You can use itertools's product and permutations:

from itertools import product, permutations  first_tuple, second_tuple = (1, 2), (4, 5)  result = ()  for tup in product(first_tuple, second_tuple):     result += (*permutations(tup),)  print(result) 

Output:

((1, 4), (4, 1), (1, 5), (5, 1), (2, 4), (4, 2), (2, 5), (5, 2)) 

product produces the tuples (two elements) produced equally by the nested for loop structure (your t1 and t2 variables), and permutations produces the two permutations produced equally by your c and d variables.

Answer 2

Here is an ugly one-liner.

first_tuple = (1, 2) second_tuple = (4, 5) tups = [first_tuple, second_tuple] res = [(i, j) for x in tups for y in tups for i in x for j in y if x is not y] # [(1, 4), (1, 5), (2, 4), (2, 5), (4, 1), (4, 2), (5, 1), (5, 2)] 

Unless you are using this for sport, you should probably go with a more readable solution, e.g. one by MrGeek below.