How to Use Iterators in Python

In this example we will show how to use iterators in Python.

2. Tips

The iterator object visits from the first element of the collection until all elements have been visited.
Iterators can only go forward from the beginning (it can not go backward).
Iterators have two basic methods: iter() and next().
Strings, lists, or tuple objects can be used to create an iterator.

2. Iter() Method

#! /usr/bin/env python3
# -*- coding: utf-8 -*-

list = ['Jack', 'Male', 'Student', '23']
it = iter(list)  
for x in it:
    print(x)

Output:

Jack
Male
Student
23

3. Next() Method

#! /usr/bin/env python3
# -*- coding: utf-8 -*-

list = [1, 2, 3, 4]
it = iter(list)  

while True:
    try:
        print(next(it))
    except StopIteration:
        exit(0)

Output: