Lecture Notes on 01 Jul 2020

def sub_sets (a, b, idx):
  hi = len(a)
  if (idx == hi):
    print (b)
    return
  else:
    c = b[:]
    b.append(a[idx])
    sub_sets (a, b, idx + 1)
    sub_sets (a, c, idx + 1)

def main():
  a = ['A', 'B', 'C']
  b = []
  sub_sets (a, b, 0)

main()