Python: iter, enumerate, zip

Iteration involves looping over sequences of values, and Python provides several built-in methods to simplify this process. In this article, we’ll explore the concept of iterators and how to use built-in functions to make iteration over sequences quick and easy.

In Python, an iterator is an object that allows us to traverse through a sequence of values one at a time. It is a fundamental concept in Python programming and is used extensively when working with lists, strings, files, and more. Iterators are at the heart of for loops, allowing you to iterate over elements in a sequence efficiently.

The iter() Function

The iter() function is a built-in Python function that creates an iterable object from a sequence. You can use it to convert lists, strings, or other iterable objects into an iterator. Here's an example of how it works:

days = ["Mon", "Tue", "Wed", "Thu", "Fri"]
iterator = iter(days)

print(next(iterator))  # Output: Mon
print(next(iterator))  # Output: Tue
print(next(iterator))  # Output: Wed

In this example, we create an iterator from the list of days and use the next() function to retrieve the…