I. Introduction to Iterators

A. What are Iterators? B. Why Use Iterators? C. How Iterators Work

II. Creating Iterators in Python A. Using iter() and next() Functions B. Creating Custom Iterators

1. Iterable Objects
2. iter() Method
3. next() Method
4. StopIteration Exception

III. Looping Through Iterators A. Using the for Loop B. Using the while Loop

IV. Built-in Iterators in Python A. range() Function B. enumerate() Function C. zip() Function D. reversed() Function E. sorted() Function

V. Infinite Iterators A. itertools.cycle() Function B. itertools.count() Function

VI. Chaining Iterators A. itertools.chain() Function B. itertools.islice() Function

VII. Generator Functions and Expressions A. What are Generators? B. Creating Generator Functions C. Generator Expressions

VIII. Advantages and Disadvantages of Iterators

IX. Conclusion