How To Use the Python Map Function 

Purpose of map()

The map() function applies a given function to every item in an iterable (e.g., list, tuple), returning a map object.

Basic Syntax

Use map(function, iterable). Replace function with a built-in, custom, or lambda function to process the iterable’s items.

Example with Built-in Function

Example: list(map(len, ["cat", "dog"])) returns [3, 3], calculating the length of each string in the list.

Using a Lambda Function

Apply a quick operation with lambda: list(map(lambda x: x**2, [1, 2, 3])) returns [1, 4, 9], squaring each number.

Working with Multiple Iterables

Combine iterables of equal length: list(map(lambda x, y: x + y, [1, 2], [3, 4])) returns [4, 6], summing corresponding elements.

Convert Output

Since map() returns an iterator, convert the result to a list, tuple, or set using list(map(...)), tuple(map(...)), or set(map(...)).