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Solution Review: Create a Fibonacci Iterator

Solution Review: Create a Fibonacci Iterator

Have a look at how to create a Fibonacci Iterator.

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Implementation

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class Fibonacci(): 
    def __init__(self): 
        self.c = 0 
        self.n = 1 
    def __iter__(self): 
        return self 
    def __next__(self): 
        ret = self.c 
        self.c, self.n = self.n, self.c + self.n 
        return ret 
for i in Fibonacci(): 
    print(i) 
    if i > 100: 
        break

Explanation

As we learned previously, an iterator is just a class that implements the iterator protocol, i.e., a __next__ method and an __iter__ method. Therefore, we implement both of these methods on line 9 and 6, respectively.

In the __init__ method (lines 2-4), we ...