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Generator in Python

When we want to work with a larg data set we should work with generator to generate item when we iterate the generator

python

from sys import getsizeof
items = (x*2 for x in range(10000))
print("gen : ", getsizeof(items))
items = [x*2 for x in range(10000)]
print("list : ", getsizeof(items))

Output

gen :  112
list :  87616

how to use generator

python

items = (x*2 for x in range(5))
for i in items:
    print(i)

Output

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