CPy equivalant of functools.reduce

[SimonDreyer]

Hi Folks, is there a CircuitPython equivalent of the 'functools.reduce' function?
I have looked at Adafruit_itertools.accumulate but I'm a bit lost!
This is the line that I am trying to duplicate in CPy

s = reduce(lambda x, y: x ^ y, int_list) # Calculate the checksum

Cheers S

[dastels]

You could use the definition of reduce from MicroPython's functools module:

Code: Select all

def reduce(function, iterable, initializer=None):
    it = iter(iterable)
    if initializer is None:
        value = next(it)
    else:
        value = initializer
    for element in it:
        value = function(value, element)
    return value

Based on your example (note that ^ is xor, not exp):

Code: Select all

int_list = [2,3,4,5,6]
s = reduce(lambda x, y: x**y, int_list)
print(s)

That results in 2348542582773833227889480596789337027375682548908319870707290971532209025114608443463698998384768703031934976 which is as expected.
Dave