Confusing itertools and generator

Question

what I'm trying to do here is print something like :

what
the
hekk
what
the
hekk
what
...

Using yield and next, where am I wrong in this code ?

https://code.sololearn.com/c2k9dAANjbR9

Answer 1

Sacar ,

here is a sample that shows how we can do the task with cycle(). also it uses a range() object to control the number of outputs, that runs as long as range is returning numbers:

from itertools import cycle

msg = ("what", "the", "hekk")

def get_shift(count, msg):
for i, _ in zip(cycle(msg), range(count)):
yield i

count = int(input()) * len(msg) # input of value 3 repeats and prints the strings from tuple msg 3 times completely
for res in get_shift(count, msg):
print(res)

Answer 2

Additionally to what Ani Jona 🕊 said: if you save the iterator/generator/whateveritiscalled you can also use the next function like this:
x=show_msg()
Print(next(x))
Print(next(x))

Answer 3

You are restarting the iterator again and again. Do something like:

for m in show_msg():
print(msg)

And don't forget to add a break or it cycles forever.

Alternatively, save the generator object:
msg_iter = show_msg()

And take it from there...
for m in msg_iter:
print(m)

Answer 4

Alexander Thiem Aren't they same ??

x = show_msg()
Print(next(x))

And

Print(next(show_msg()))

Answer 5

Ani Jona 🕊 you are right, but i want to make it clear that i don't want an Infinite iteration, i want to use 'next' each time

Answer 6

You can call next on the generator object, as Alexander Thiem demonstrated. Note that in his and my example, show_msg is called only once! That call provides the generator object; all else is done on that object.

Answer 7

It might help to think of generators (in this case for counting only) like this:

Class generator:
__init__(self):
Self.x=1
Next(self):
Self.x+=1
Return self.x
def fun():
Return generator()

Print(fun().next()) #returns a new generator object each time so .next() always results in the starting value

Gen=fun()
Print(gen.next()) #counts upwards in the same object

Answer 8

Lothar Wunderbar !!! Thats exactly what i wanted.

Answer 9

Thanks Everyone for your time and effort !