Python - Built-in Modules

Python From Beginner to Advanced

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Python provides several built-in modules that help perform essential tasks like file handling, system operations, random number generation, and more. These modules enhance Python’s functionality without requiring additional installations, making programming more efficient and manageable.

Below is a list of commonly used built-in modules:

Module	Purpose	Example Usage
`random`	Generates random numbers and choices.	`random.randint(1, 10)`
`os`	Interacts with the operating system (files, directories).	`os.getcwd()`
`sys`	Provides system-related functions.	`sys.version`
`json`	Works with JSON data (serialization & deserialization).	`json.dumps(data)`
`time`	Handles time-related operations (delays, timestamps).	`time.sleep(2)`
`datetime`	Works with date and time functions.	`datetime.datetime.now()`

Example 1: Using the "random" Module

The random module is commonly used for generating random numbers, selecting random elements from sequences, and shuffling data.

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Explanation:

random.randint(1, 10) generates a random integer between 1 and 10.
random.choice(colors) selects a random color from the list.

Example 2: Using the "os" Module

The os module provides functions for interacting with the operating system, including file and directory management.

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Explanation:

os.getcwd() returns the current working directory.
os.listdir() lists all files and folders in the directory.

Python’s built-in modules simplify complex operations, making programming more efficient.

Modules like random and os provide essential functions for randomization and system interaction.
Modules like time and datetime handle time-based operations but will be covered in a separate lesson.
Using built-in modules helps avoid unnecessary coding, improving program performance and readability.

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