So I'm trying to make a infinite loop that uses a for loop instead of a while loop. This is my current code. If this code works it should produce x infinitely. Current code:
z=1
for x in range(0,z):
print(x)
z=z+1
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3And does it "produce x infinitely"? You did try it?Some programmer dude– Some programmer dude2018-03-06 12:37:54 +00:00Commented Mar 6, 2018 at 12:37
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1Is there any question ?Yann– Yann2018-03-06 12:38:16 +00:00Commented Mar 6, 2018 at 12:38
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2Thanks for telling us that you are trying to make an infinite loop.Aleksei Maide– Aleksei Maide2018-03-06 12:51:21 +00:00Commented Mar 6, 2018 at 12:51
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You can use any of the infinite Iterators in 'itertools'. More here: docs.python.org/2/library/itertools.htmlcodePrady– codePrady2018-03-06 13:35:53 +00:00Commented Mar 6, 2018 at 13:35
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Yes I have tested it.ALAN– ALAN2018-03-06 13:54:36 +00:00Commented Mar 6, 2018 at 13:54
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3 Answers
That doesn't work because the first time you enter the for loop the range function generates a range from zero to the value of z at that point, and later changes to z does not affect it. You can do something like what you want using, for example, itertools.count:
from itertools import count
for x in count():
print(x)
Comments
range returns an iterator. The iterator is already generated and evaluated before the loop iteration. (It's the returned iterator on which the loop is iterating).
The value of z is not used after the iterator is returned hence incrementing or changing its value is no-op.
If you really want an infinite loop using for you will have to write your custom generator.
For eg:
def InfiniteLoop():
yield 1
To be used as :
for i in InfiniteLoop()
Comments
Update list after each iteration make infinite loop
list=[0]
for x in list:
list.append(x+1)
print (x)
2 Comments
Matteo Ragni
I upvoted, but I also invite you to elaborate a little more. I think that some explaination may help the OP to understand the concept behind your solution, and why its use of range is not working.
Ali Rasim Kocal
Even though this works as intended, it is generally considered bad practice to add/remove elements to/from an array you are iterating over.