Python Sequence Types

These represent finite ordered sets indexed by non-negative numbers. The built-in function len() returns the number of items of a sequence. When the length of a sequence is n , the index set contains the numbers 0, 1, ..., n-1 . Item i of sequence a is selected by a<a href='https://docs.python.org/3/reference/datamodel.html#the-standard-type-hierarchy' target='_blank' rel='nofollow'>i] .

[Python Docs - Standard Type Hierarchy

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