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Comprehensions & generators

List/dict/set comprehensions, generator expressions, and lazy iteration.

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Comprehensions & generators easy

How to Create a Pairwise Generator with zip and tee in Python

Build a memory-efficient generator that yields successive overlapping pairs from any iterable using zip and tee.

itertools generators zip
Python 
from itertools import tee


def pairwise(iterable):
    """Yield successive overlapping pairs from iterable."""
    a, b = tee(iterable)
    next(b, None)
    return zip(a, b)


if __name__ == "__main__":
    values = [1, 2, 3, 4, 5]
    print(list(pairwise(values)))
    print(list(pairwise("hello")))
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