Changing the number of iterations in a for loop

Question

I have code like this:

loopcount = 3
for i in range(1, loopcount)
   somestring = \'7\'
   newcount = int(somestring)
   loopcount = newcount

Answer 1

To specifically address the question "How do I change the range bounds", you can take advantage of the send method for a generator:

def adjustable_range(start, stop=None, step=None):
    if stop is None:
        start, stop = 0, start

    if step is None: step = 1

    i = start
    while i < stop:
        change_bound = (yield i)
        if change_bound is None:
            i += step
        else:
            stop = change_bound

Usage:

myrange = adjustable_range(10)

for i in myrange:
    if some_condition:
        myrange.send(20) #generator is now bounded at 20