How to get all subsets of a set? (powerset)

Question

Given a set

{0, 1, 2, 3}

How can I produce the subsets:

[set(),
 {0},
 {1},
 {2},
 {3},
 {0, 1},
 {0, 2},
 {0, 3},
 {1, 2}         


        

Answer 1

import math    
def printPowerSet(set,set_size): 
    pow_set_size =int(math.pow(2, set_size))
    for counter in range(pow_set_size):
    for j in range(set_size):  
        if((counter & (1 << j)) > 0):
            print(set[j], end = "")
    print("")
set = ['a', 'b', 'c']
printPowerSet(set,3)