Python using reduce()

using reduce when you  need to  single cumulative result output 

example  we wanted multiply entire  list items or addition them  each item.

[1,2,3] if addition then 1+2+3 become 6

for that we need to import the reduce first from functools module

it accept function and iterables 

e.g. reduce(function, iterlabes)

use when you wanted to flat the result or output and do not use for simple operations or single operation.

code :

from functools import reduce

def add(s1, s2):

 return s1 + s2

asequence = [1, 2, 3]

print(reduce(add, asequence))