How Can I Infinitely Loop An Iterator In Python, Via A Generator Or Other?

It's my understanding that using a Generator is the best way to achieve something like this, but I'm open to suggestions. Specifically, one use case is this: I'd like to print som

Solution 1:

You can use itertools.cycle (source included on linked page).

import itertools

a = [1, 2, 3]

for element in itertools.cycle(a):
    print element

# -> 1 2 3 1 2 3 1 2 3 1 2 3 ...

Solution 2:

Try this-

L = [10,20,30,40]

defgentr_fn(alist):
    while1:
        for j in alist:
            yield j

a = gentr_fn(L)
print a.next()
print a.next()
print a.next()
print a.next()
print a.next()
print a.next()
print a.next()

>>gentr_fn(x,y)
10203040102030 ...

Solution 3:

You can use module to keep it simple. Just make sure not to start iterating from 0.

my_list = ['sam', 'max']

for i in range(1, 100):
    print(my_list[(i % len(my_list))-1])

Solution 4:

You can iterate over a list, appending an item to it:

somelist = [item1, item2, item3]
for item in somelist:
    somelist.append(item)
    do_something()