[Python] zip()

zip()

zip(*iterables, strict=False)

zip() returns an iterator of tuples,
where the i-th tuple contains the i-th element from each of the argument iterables.

Like:

zip([1, 2, 3], ['sugar', 'spice', 'everything nice'])

"""
(1, 'sugar')
(2, 'spice')
(3, 'everything nice')
"""

Without the strict=True argument,
any bug that results in iterables of different lengths will be silenced,
possibly manifesting as a hard-to-find bug in another part of the program.

範例

a = [1, 2, 3]
b = [4, 5, 6]
c = [7, 8, 9, 0]
zipped = zip(a, b, c)
##
zipped = 
[(1, 4, 7), 
 (2, 5, 8), 
 (7, 8, 9)]
##
d, e, f = (zip(*zipped))
##
zip(*zipped) = 
[(1, 2, 3), (4, 5, 6), (7, 8, 9)]
d = (1, 2, 3)
e = (4, 5, 6)
f = (7, 8, 9)
##

Last Updated on 2024/06/16 by A1go