The os Module

Python’s os module provides a way to interact with the operating system. It includes functions for creating, removing, and checking the existence of directories and files. In this tutorial, we’ll use the os.path.exists and os.makedirs functions. This module contains the necessary functions to check for the existence of a directory and create it if it doesn’t exist.

import os

def create_directory(path):
    if not os.path.exists(path):
        os.makedirs(path)
        print(f"Directory '{path}' created successfully.")
    else:
        print(f"Directory '{path}' already exists.")

# Example usage
directory_path = 'my_new_directory'
create_directory(directory_path)

Key points

• Importing the os Module: This allows us to use the functions provided by the module.
• Defining the create_directory Function: The function takes a single argument, path. It checks if the directory exists using os.path.exists(path).
• Checking for Directory Existence: If the directory does not exist (if not os.path.exists(path)), the function creates it using os.makedirs(path).
• Creating the Directory: The os.makedirs function creates the directory, including any necessary parent directories.
• Printing Status Messages: The function prints a message indicating whether the directory was created or if it already existed.

Conclusion

Using the os module in Python, you can easily check for the existence of a directory and create it if necessary. This ensures that your scripts and applications can handle file operations without running into errors due to missing directories. With this approach, you can make your code more robust and error-resistant.