Python Fibonacci help

[Sdot]

Hey guys, I'm taking a Raspberry Pi course this semester and I'm looking for some assistance.

 

We are using Python and were tasked with the Fibonacci Sequence. How do I call? How do I get this to work?

Any help is appreciated.

    class Fib:
        def __init__(self, max):
            self.max = max
        
        def __iter__(self):
            self.a = 0
            self.b = 1
            return self
            
        def __next__(self):
            fib = self.a
            if fib > self.max:
                raise StopIteration
            self.a, self.b = self.b, self.a + self.b
            return fib

 

[elpiop]

x = Fib(max) 

x.__iter__()

x.__next__() # will print the next fib number when you call it

 

[Sdot]

3 minutes ago, elpiop said:

x = Fib(max) 

x.__iter__()

x.__next__() # will print the next fib number when you call it

 

Do I have to put this in a def main():?

Does x represent a number?

[elpiop]

On 2/4/2018 at 7:50 PM, Sdot said:

Do I have to put this in a def main():?

Does x represent a number?

 

[Sdot]

def main():
      x = Fib(max)
      x.__iter__()
      x.__next()

 

This code added below the rest of it results in the following message in the shell. Nothing happens.

>>>> %Run FibLab3.py

>>>>

Edit: I added print(x.__next__()) doesn't seem to print anything.

Also, I'm understanding this a lot more now. The x becomes an object of the class that comes after the dot. Thank you, you are being very helpful.

adding

[elpiop]

19 minutes ago, Sdot said:

def main():
      x = Fib(max)
      x.__iter__()
      x.__next()

 

This code added below the rest of it results in the following message in the shell. Nothing happens.

>>>> %Run FibLab3.py

>>>>

Edit: I added print(x.__next__()) doesn't seem to print anything.

Also, I'm understanding this a lot more now. The x becomes an object of the class that comes after the dot. Thank you, you are being very helpful.

adding

You need to specify a number for max, like Fib(100). Then the program will stop when the Fibonacci number exceeds that value

[Sdot]

Sorry, I put in x = Fib(20) but I am still getting the same result.

[elpiop]

Are you calling the main function?

Make sure you have main() at the bottom of your code.

 

[Sdot]

I just added this and it finally printed the 1. Now once I figure out how to put the x.__next__() into a loop I should be good to go

if __name__ == "__main__":
      main()

 

[Sdot]

Does this look correct?

for i in range(100):
      print(x.__next__())

[mathijs727]

15 minutes ago, Sdot said:

Does this look correct?

for i in range(100):
      print(x.__next__())

Sorry cant format cause Im on mobile.

You wrote an iterator, so use it like this:

 

for i in Fib(100):

    print(i)

[Sdot]

Got it!

I want to thank you for walking through this with me. Couldn't have done it without you.