iterators.py

iterators.py

from functools import reduce


arr = [1, 2, 3]
map1 = map((lambda x: (print("inside map1: %s" % (x + 1)) or x + 1)), arr)
map2 = map((lambda x: (print("inside map2: %s" % (x + 2)) or x + 2)), map1)
print("sum: " + str(reduce((lambda x, y: x + y), map2, 0)))
print(sorted(map2)) # gives [] since iterator has been consumed

"""
inside map1: 2
inside map2: 4
inside map1: 3
inside map2: 5
inside map1: 4
inside map2: 6
sum: 15
[]
"""