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'for ... in' Statement with List of Tuples
How to use "for ... in" statements with a list of tuples in Python code?
✍: FYIcenter.com
Usually, "for ... in" statements are used with simple lists.
But you can also use a "for ... in" statement with a list of tuples.
In this case, you can put multiple looping variables inside the loop item:
for (v1, v2, ... ) in list_of_tuples: statement-block else : statement-block
For example:
>>> for (v1, v2) in [('gallahad','the pure'), ('robin', 'the brave')]: ... print(v1+", "+v2) ... gallahad, the pure robin, the brave
This form of loops is very useful if you want to loop through a "dict" object:
>>> d = {'gallahad': 'the pure', 'robin': 'the brave'} >>> for (k,v) in d.items(): ... print(k+": "+v) ... gallahad: the pure robin: the brave
And it is also very useful if you want to loop through a "list" object:
>>> l = ['tic', 'tac', 'toe'] >>> for (i,v) in enumerate(l): ... print(i, v) ... 0 tic 1 tac 2 toe
⇒ 'while ... else' Repeating Statement Blocks
⇐ 'for ... in ... else' Repeating Statement Blocks
2018-08-14, 1495👍, 0💬
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