Python trick for getting max/min values from iterables

python-tricks_iterables_7.py

# Getting maximum from iterable
>>> a = [1, 2, -3]
>>> max(a)
2

# Getting maximum from iterable
>>> min(a)
1

# Bot min/max has key value to allow to get maximum by appliing function
>>> max(a,key=abs)
3

Shouldn't getting minimum of a
min(a) output -3

while min(a, key=abs) will output 1