How does reduce function work?

Question

As far as I understand, the reduce function takes a list l and a function f. Then, it calls the function f on first two elements of th

Answer 1

Reduce executes the function in parameter#1 successively through the values provided by the iterator in parameter#2

print '-------------- Example: Reduce(x + y) --------------'

def add(x,y): return x+y
x = 5
y = 10

import functools
tot = functools.reduce(add, range(5, 10))
print 'reduce('+str(x)+','+str(y)+')=' ,tot

def myreduce(a,b):
    tot = 0
    for i in range(a,b):
        tot = tot+i
        print i,tot
    print 'myreduce('+str(a)+','+str(b)+')=' ,tot

myreduce(x,y)

print '-------------- Example: Reduce(x * y) --------------'

def add(x,y): return x*y
x = 5
y = 10

import functools
tot = functools.reduce(add, range(5, 10))
print 'reduce('+str(x)+','+str(y)+')=' ,tot

def myreduce(a,b):
    tot = 1
    for i in range(a,b):
        tot = tot * i
        print i,tot
    print 'myreduce('+str(a)+','+str(b)+')=' ,tot

myreduce(x,y)