August 2019
Beginner
482 pages
12h 56m
English
Content preview from Learn Python by Building Data Science Applications
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frozenset
frozenset lives in Python itself, so there is no need to import anything. They are 100% similar to ordinal sets, except that they are immutable. Just like tuples, you cannot change them, and they can be used as dictionary keys, among other similarities:
>>> frozenset('Hello')frozenset({'e', 'H', 'l', 'o'})