[docs] Bug in functools.reduce

10 Jun 2018

      Hi,

I have found bug in functools.reduce (Python V 3.6.5). The function ignores the value of initializer, if initializer is zero.

Below is the example code

import functools as f

ar = [2, 5, 4, 1, 3]
out = f.reduce(lambda prev, curr: prev < curr and prev or curr, ar, 0)
print(out)
...
...
Expected: 0
 Actual: 1
out2 = f.reduce(lambda prev, curr: prev < curr and prev or curr, ar, -1)
print(out2)
...
...
Expected: -1
Actual: -1
Best Regards,
Witthawat P.