python uses zip to iterate over multiple sequence examples simultaneously

This example shows that python uses zip to iterate multiple sequences at the same time. Share it for your reference, as follows:

zip can traverse multiple iterators in parallel

In python 3, zip is equivalent to a generator, which generates Yuan Zu in the traversal process, and python2 generates Yuan Zu well and returns the whole list once

zip(x,y,z) Generates an iterator that returns tuples (x, y, z)

>>> x = [1, 2, 3, 4, 5]
>>> y = ['a', 'b', 'c', 'd', 'e']
>>> z = ['a1', 'b2', 'c3', 'd4', 'e5']
>>> for i in zip(x,y,z):
...  print(i)
... 
(1, 'a', 'a1')
(2, 'b', 'b2')
(3, 'c', 'c3')
(4, 'd', 'd4')
(5, 'e', 'e5')

Traversal length is not 1 sample (as long as one is exhausted, it will end. If you want to traverse different lengths, please use zip_longest of itertools)

>>> x = [1, 2, 3, 4, 5, 6]
>>> y = ['a', 'b', 'c', 'd', 'e']
>>> for i in zip(x,y):
...  print(i)
... 
(1, 'a')
(2, 'b')
(3, 'c')
(4, 'd')
(5, 'e')

>>> from itertools import zip_longest
>>> x = [1, 2, 3, 4, 5, 6]
>>> y = ['a', 'b', 'c', 'd', 'e']
>>> for i in zip_longest(x,y):
...  print(i)
... 
(1, 'a')
(2, 'b')
(3, 'c')
(4, 'd')
(5, 'e')
(6, None)

More readers interested in Python can check the topics of this site: "Python Data Structure and Algorithm Tutorial", "Python Function Use Skills Summary", "Python String Operation Skills Summary", "Python Introduction and Advanced Classic Tutorial" and "Python File and Directory Operation Skills Summary"

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