Using a generator to find Fibonacci Numbers

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A practical use case of a generator is to iterate through values of an infinite series. Here’s an example of finding the first ten terms of the Fibonacci Sequence.

def fib(a=0, b=1):
    """Generator that yields Fibonacci numbers. `a` and `b` are the seed values"""
    while True:
        yield a
        a, b = b, a + b

f = fib()
print(', '.join(str(next(f)) for _ in range(10)))

0, 1, 1, 2, 3, 5, 8, 13, 21, 34

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