How to get combination in python?

Question

I have a list like below, I want to find simple permutation with little bit modification,

For Example

l=['a', 'b']

Output:

[('a', 'a'), ('a', 'b'), ('b', 'b')]

I followed,

Try-1

list(itertools.product(L, repeat=2))

returns,

[('a', 'a'), ('a', 'b'), ('b', 'a'), ('b', 'b')]

Try -2

print list(itertools.permutations(['a', 'b']))

returns,

[('a', 'b'), ('b', 'a')]

Try-3

i can do like below,

temp= [tuple(sorted((i,j))) for i in ['a', 'b'] for j in ['a', 'b']]
print list(set(temp))

But it seems inefficient way to solve this.

Dani Mesejo · Accepted Answer · 2018-11-03 20:00:47Z

5

from itertools import combinations_with_replacement

l=['a', 'b']
for c in combinations_with_replacement(l, 2):
    print(c)

Output

('a', 'a')
('a', 'b')
('b', 'b')

answered Nov 3, 2018 at 20:00

Dani Mesejo

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