CODEWITHSUNDEEP
pythonloopsclassoopwhile-loop
TheodorosNikoleris
TheodorosNikoleris

Reputation: 65

Is looping inside class possible?

I already asked this question, but I guess I have to clarify, and for that I apologize. Let us consider the most mundane, ultimate noobie while loop.

    max_count = 4
    count = 0
    while count < max_count:
        print(count)
        count += 1

It obviously prints 0 1 2 3. So, I naively reckon, mayhaps we do it OOP style, as below.

    class Foo:
        def __init__(self, max_count):
            self.max_count = max_count
            self.count = 0
    
        def loop(self):
            while self.count < self.max_count:
                print(self.count)
                self.count += 1
    
    A = Foo(4).loop()

and again it obligingly spurts out 0 1 2 3. But then I get greedy and say to myself, what if I don't want to print the data, but just retrieve them for something higher and nobler, say doing a few nested loops. So instead of print in the loop method I do a return as below.

    class Foo:
        def __init__(self, max_count):
            self.max_count = max_count
            self.count = 0
    
        def loop(self):
            while self.count < self.max_count:
                return self.count
                self.count += 1
    
    A = Foo(4).loop()
    print(A)

And the powers that be reward me with a nice, flat 0. In my uneducated lingua, I would say that the class is 'choking' the loop. Please, enlighten me: Is it even possible to loop inside a class or not. And if yes, please point me in the right direction and I will do the digging. BTW, I would like it to be in OOP mode, since what I really intend to is control a number of stepper motors concurrently. If I try to do it procedurally, that will bring back to my 1988 Pascal, Fortran 77 days, and that is a chalice from which I do not want to drink again. I thank you in advance kind comrades.

Upvotes: 0

Views: 86

Answers (1)

Ian Rehwinkel
Ian Rehwinkel

Reputation: 2615

The reason your result is 0 is because you are returning from the loop function before incrementing the value. I assume you intended to print the value? or maybe return it after the loop?

This code:

while self.count<self.max_count:
    return self.count
    self.count+=1

Should be:

while self.count < self.max_count:
    self.count+=1
return self.count

Upvotes: 1

Related Questions