What are generators exactly and how does the memory reserved for them...?

Answer 1

Yathindra S. Yes, for example you want to create a list of numbers multiplied by itself from 0-9.

You might do it using list comprehension.

nums = [i * i for i in range(10)]

You can do the same thing using generator.

def num_generator(length):
for i in range(length):
yield i * i

nums = num_generator(10)

However, you cannot access the elements of generator by indexing. You can only iterate over it.

To really understand generators. You must first understand the concept of iterables and iterators.

Answer 2

Generator functions behaves likes an iterator.

When you create a list, all of its elements are stored in memory. Generator functions yields only one element at a time. That means only one element is stored in memory. And that makes it more efficient in memory management.

Answer 3

Hello Nadie,

So, if we want to create a list of 100 numbers, don't we need to store 100 values in it.. if we use generators...?

Answer 4

Hello Nadie Fiind,

Thank you so much for your answer. I found it so useful. May others find this answer perfect.