How can i add subset to set in python [duplicate]

Question

i can't add set to python

you can add tuple to python set

a={1,2,3,4,5}
a.add((10,11,12))

when i try same with set

a={1,2,3,4,5}
a.add({10,11,12})
TypeError: unhashable type: 'set'

Answer 1

You can add frozensets to a set, since they are hashable (because they are immutable).

a = {1,2,3,4,5}
a.add(frozenset([10,11,12]))

Answer 2

I'd assume you are trying to get:

{1, 2, 3, 4, 5, 10, 11, 12}

You are appending a set which is unhashable. And when you add the tuple you will get:

{1, 2, 3, 4, 5, (10, 11, 12)}

You are trying you get the union:

a.union({10,11,12})

Or:

a | {10,11,12}