tuple

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The built-in tuple type. Example tuple expressions:

x = (1, 2, 3)
Accessing elements is possible using indexing (starts from 0):
e = x[1]   # e == 2
Lists support the + operator to concatenate two tuples. Example:
x = (1, 2) + (3, 4)   # x == (1, 2, 3, 4)
x = ("a", "b")
x += ("c",)            # x == ("a", "b", "c")
Similar to lists, tuples support slice operations:
('a', 'b', 'c', 'd')[1:3]   # ('b', 'c')
('a', 'b', 'c', 'd')[::2]  # ('a', 'c')
('a', 'b', 'c', 'd')[3:0:-1]  # ('d', 'c', 'b')
Tuples are immutable, therefore x[1] = "a" is not supported.