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Return the minimum and maximum values from an iterable in one pass
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| def extent(collection): | |
| """ | |
| Return the minimum and maximum values from an iterable in one pass | |
| """ | |
| itr = iter(collection) | |
| first_value = next(itr) | |
| minimum = first_value | |
| maximum = first_value | |
| for v in itr: | |
| minimum = min(v, minimum) | |
| maximum = max(v, maximum) | |
| return (minimum, maximum) | |
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