Print all subsequences of a string in Python

Given a string, we have to find out all subsequences of it. A String is a subsequence of a given String, that is generated by deleting some character of a given string without changing its order.

Examples:

Input : abc
Output : a, b, c, ab, bc, ac, abc

Input : aaa
Output : a, aa, aaa

Prerequisite : itertools.combinations() module in Python to print all possible combinations



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# Python Implementation of the approach
import itertools
  
def Sub_Sequences(STR):
    combs = []
    for l in range(1, len(STR)+1):
        combs.append(list(itertools.combinations(STR, l)))
    for c in combs:
        for t in c:
            print (''.join(t), end =' ')
  
# Testing with driver code
if __name__ == '__main__':
    Sub_Sequences('abc')

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Output:

a b c ab ac bc abc
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