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Question: Although it would be handy for newcomers to know some usages of a set, should this be considered part of the definition?

I am refering to this part:

eases duplicate removal and computation of mathematical operations such as intersection and difference.

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Thanks folks. Perhaps reorganizing a bit would help:

An unordered collection of distinct :term:`hashable` objects that were introduced in :pep:`218`.

Python provides two built-in set types: set (a :term:`mutable` type), and frozen set (an :term:`immutable` type). See :ref:`types-set`.

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