pyminmax 0.1.1

minmax(x): min(x), max(x) in one pass

pyminmax

minmax(iterable, *, key=None)
minmax(iterable, *, default, key=None)
minmax(arg1, arg2, *args, key=None)

With a single iterable argument, return its smallest and largest items as a tuple pair. The default keyword-only argument specifies an object to return if the provided iterable is empty. If the iterable is empty and default is not provided, a ValueError is raised.

With two or more arguments, return the smallest and largest arguments as a tuple pair.

The key argument specifies a one-argument ordering function like that used for list.sort().

If multiple items are minimal or maximal, the function returns the first ones encountered.

It is written in C, adapted straight from CPython's implementation of min(), max().

Installation

pip install pyminmax

Usage

>>> from pyminmax import minmax
>>> minmax([5, 2, 0, 100, -100, 10])
(-100, 100)
>>> minmax((), default=1)
1
>>> minmax(5, 2, 0, 100, -100, 10)
(-100, 100)
>>> minmax(5, 2, 0, 100, -100, 10, key=lambda x: -x)
(100, -100)

Test

Once installed, run the test suite via

python -m unittest pyminmax.tests --verbose