Python Frozenset

Question

I am using frozenset and I would like to avoid the output containing 'frozenset'. For example, I have

x = [frozenset([item]) for item in Set]

Output: frozenset(['yes']) => frozenset(['red', 'blue'])

Any ideas?

I would just like (['yes']) => (['red', 'blue']). Essentially omitting 'frozenset'. — user3318660, Dec 06 '14 at 06:27

score 1 · Accepted Answer · answered Dec 06 '14 at 06:47

1

You can do this by creating a subclass of frozenset and overriding its __repr__ method:

class MyFrozenSet(frozenset):
    def __repr__(self):
        return '([{}])'.format(', '.join(map(repr, self)))
...     
>>> lst = [['yes'], ['red', 'blue']]
>>> [MyFrozenSet(x) for x in lst]
[(['yes']), (['blue', 'red'])]

answered Dec 06 '14 at 06:47

Ashwini Chaudhary

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you don't need a class to do - using a class seems overkill to me. and overriding `__repr__` like this breaks the semantics of what `__repr__` is expected to do. – Tony Suffolk 66 Dec 06 '14 at 08:13
1

*"If at all possible, [`__repr__`] should look like a valid Python expression that could be used to recreate an object with the same value (given an appropriate environment). If this is not possible, a string of the form `<...some description...="" useful="">` should be returned."* – jonrsharpe Dec 06 '14 at 09:25

Python Frozenset

1 Answers1