Have you ever encountered memory issues while working with a very large data set, or working with an infinite sequence of data? Converting the objects to iterable ones helps here, which can be easily done by the Python generator functions. Since PEP 255, when generators were first introduced, Python has incorporated them heavily. You can declare a function that acts like an iterator using generator functions in an easy and efficient way.
In this article, we will discuss what iterator objects in Python are, how they can be declared using the Python generator functions and expressions, and why and where they are used and preferred.