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reduce () in python

#The reduce() function accepts a function and a sequence and
#returns a single value calculated as follows:

#1) Initially, the function is called with the first two items from the sequence 
#and the result is returned.
#2) The function is then called again with the result obtained in step 1 
#and the next value in the sequence. This process keeps repeating 
#until there are items in the sequence.

>>>
>>> from functools import reduce
>>> 
>>> def do_sum(x1, x2): return x1 + x2
... 
>>> 
>>> reduce(do_sum, [1, 2, 3, 4])
10
>>>
Source by thepythonguru.com #
 
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