raise exception within generator

[buran]

You don't need to raise that StopIteration.

def myRange(start, end):
    while start < end:
        yield start
        start += 1
 
for n in myRange(2, 5):
    print(n)

spam = myRange(2, 5)
while True:
    print(next(spam))

Output:
2
3
4
2
3
4
Traceback (most recent call last):
  File "***", line 11, in <module>
    print(next(spam))
StopIteration

as you can see, it will raise it when needed.
In your code it handles the StopIteration when generator is exhausted, but then you raise the exception that is not handled