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import itertools | |
#using add and mul operator,so importing operator module | |
import operator | |
#using reduce(),so importing reduce() from functools module | |
from functools import reduce | |
#If func parameter is not mentioned,by default it will perform addition operation) | |
l1=itertools.accumulate([1,2,3,4,5]) | |
print (l1)#Output:<itertools.accumulate object at 0x02CD94C8> | |
#Converting iterator to list object. | |
print (list(l1))#Output:[1, 3, 6, 10, 15] | |
#using reduce() for same function | |
r1=reduce(operator.add,[1,2,3,4,5]) | |
print (r1)#Output:15 | |
#If initial parameter is mentioned, it will start accumulating from the initial value. | |
#It will contain more than one element in the ouptut iterable. | |
l2=itertools.accumulate([1,2,3,4,5],operator.add,initial=10) | |
print (list(l2))#Output:[10, 11, 13, 16, 20, 25] | |
#it takes operator mul as function | |
# It will perform multiplication on first two elements, then it will perform multiplication of next two element in the iterable. | |
l3=itertools.accumulate([1,2,3,5,5],operator.mul) | |
print (list(l3))#Output:[1, 2, 6, 30, 150] | |
#using reduce() for same function mul. | |
r2=reduce(operator.mul,[1,2,3,4,5]) | |
print (r2)#Output:120 | |
l4=itertools.accumulate([2,4,6,3,1],max) | |
print (list(l4))#Output:[2, 4, 6, 6, 6] | |
#using reduce for same function max | |
r3=reduce(max,[2,4,6,3,1]) | |
print (r3)#Output:6 | |
#It takes min function as parameter. | |
# It will compare two elements and find the minimum element,then compare the other elements and find the mininum element. | |
l5=itertools.accumulate([2,4,6,3,1],min) | |
print (list(l5))#Output:[2, 2, 2, 2, 1] | |
#using reduce() for same function min | |
r4=reduce(min,[2,4,6,3,1]) | |
print (r4)#Output:1 |
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