Overview
A python set object can be constructed by specifying the elements of the sets separated by
commas inside two curly braces. Such a set object is a mutable object. That is elements
can be added to or removed from the set. Using curly braces only non-frozen, mutable sets
can be created.
Since a mutable set object does not have a hash value, they can not be used as dictionary key.
Neither they can be used as an element of another set.
Example:
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>>> containers = {'list', 'tuple', 'range', 'str', 'bytes', 'bytearray', 'memoryview', 'jar', 'tin'} >>> containers.add('set') >>> containers.add('frozenset') >>> containers.add('dict') >>> containers.remove('jar') >>> containers.remove('tin') >>> print(containers) {'frozenset', 'set', 'list', 'bytearray', 'tuple', 'bytes', 'str', 'dict', 'range', 'memoryview'} |