How to Effectively Iterate Over Strings and Other Iterables in Python?

Iterating Through Strings in Python

To iterate over a string in Python, obtaining each character in a loop, employ the straightforward for loop construct:

<code class="python">for c in "string":
    # Perform actions on c</code>

Additionally, you can iterate through other objects in Python:

• Files: Open a file and iterate over its lines:

<code class="python">with open(filename) as f:
    for line in f:
        # Operate on line</code>

This may appear enigmatic but follows a simple protocol.

Creating Your Own Iterable Objects

To make your own iterables, define an iterator with a next() method and implement an __iter__ method on a class to enable iteration. The __iter__ method returns an iterator object with a next() method.

For further information, refer to the official documentation.

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