reduce() functions bring a bit of functional programming to Python. All three of these are convenience functions that can be replaced with List comprehensions or loops but provide a more elegant and short-hand approach to some problems
reduce() function work differently than
filter(). It does not return a new list based on the function and iterable we've passed. Instead, it returns a single value.
reduce() isn't a built-in function anymore, and it can be found in the functools module.
reduce() function works by calling the function we passed for the first two items in the sequence. The result returned by the function is used in another call to function alongside the next (third in this case), element.
from functools import reduce def add(x, y): return x + y list = [2, 3, 4, 7]; print(reduce(add, list))
It can be also done by using
lambda function like