learn Python By Example – How to Find All Combinations For A List Of Objects

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All Combinations For A List Of Objects

Preliminary


/* Import combinations with replacements from itertools */
from itertools import combinations_with_replacement

Create a list of objects


/* Create a list of objects to combine */
list_of_objects = ['warplanes', 'armor', 'infantry']

Find all combinations (with replacement) for the list


/* Create an empty list object to hold the results of the loop */
combinations = []

/* Create a loop for every item in the length of list_of_objects, that, */
for i in list(range(len(list_of_objects))):
    /* Finds every combination (with replacement) for each object in the list */
    combinations.append(combinations_with_replacement(list_of_objects, i+1))
[<itertools.combinations_with_replacement at 0x7f85d03c6408>,
 <itertools.combinations_with_replacement at 0x7f85d03c6458>,
 <itertools.combinations_with_replacement at 0x7f85d03c64a8>]

/* Flatten the list of iterators into a single list */
combinations = [i for row in combinations for i in row]

/* View the results */
combinations
[('warplanes',),
 ('armor',),
 ('infantry',),
 ('warplanes', 'warplanes'),
 ('warplanes', 'armor'),
 ('warplanes', 'infantry'),
 ('armor', 'armor'),
 ('armor', 'infantry'),
 ('infantry', 'infantry'),
 ('warplanes', 'warplanes', 'warplanes'),
 ('warplanes', 'warplanes', 'armor'),
 ('warplanes', 'warplanes', 'infantry'),
 ('warplanes', 'armor', 'armor'),
 ('warplanes', 'armor', 'infantry'),
 ('warplanes', 'infantry', 'infantry'),
 ('armor', 'armor', 'armor'),
 ('armor', 'armor', 'infantry'),
 ('armor', 'infantry', 'infantry'),
 ('infantry', 'infantry', 'infantry')]

 

 

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