How to Create a Hotkey in Python?

Hotkeys are a convenient way to automate repetitive tasks in Python programs. They allow users to perform actions quickly and easily, without having to navigate through menus or use a mouse. In this tutorial, we will discuss how to create a hotkey in Python using the keyboard library.

The keyboard library provides a simple and easy-to-use API for registering hotkeys and responding to keyboard events. By creating hotkeys in your Python programs, you can enhance the user experience and improve productivity by allowing users to perform tasks quickly and efficiently.

Installation

Before we start, install the keyboard library using pip ?

pip install keyboard

Note: This library requires administrator/root privileges on most systems due to its low-level keyboard access.

Approach to Create a Hotkey in Python

To create a hotkey in Python, we will be using the keyboard library. This library allows us to listen for keyboard events and perform actions when specific keys are pressed. The keyboard library is cross-platform and works on Windows, macOS, and Linux.

The general approach for creating a hotkey in Python using the keyboard library is ?

• Import the keyboard library

• Define a function that will be executed when the hotkey is pressed

• Register the hotkey using the keyboard library

• Listen for keyboard events

Example 1: Basic Space Key Hotkey

In this example, we will create a hotkey that prints a message when the "space" key is pressed ?

# import the keyboard module
import keyboard

# define a function that will be executed when the hotkey is pressed
def hotkey_pressed():
    print("Space was pressed!")

# register the hotkey using the keyboard library
keyboard.add_hotkey('space', hotkey_pressed)

print("Press space to trigger hotkey. Press Ctrl+C to exit.")

# wait for keyboard events
keyboard.wait()

Explanation

• Import the keyboard library and define the hotkey_pressed() function to print a message when the hotkey is triggered.

• The keyboard.add_hotkey() function registers the hotkey. It takes two arguments: the key name ("space") and the callback function (hotkey_pressed).

• The keyboard.wait() function keeps the program running and listening for keyboard events.

Output

When you run the code and press the space key, you will see ?

Press space to trigger hotkey. Press Ctrl+C to exit.
Space was pressed!

Example 2: Combination Hotkey

In this example, we will create a more advanced hotkey using key combinations ?

# import the keyboard module
import keyboard
import time

# define functions for different hotkeys
def save_function():
    print("Save hotkey pressed! (Ctrl+S)")

def quit_function():
    print("Quit hotkey pressed! (Ctrl+Q)")
    keyboard.unhook_all()  # Remove all hotkeys
    exit()

def hello_function():
    print("Hello from Ctrl+H!")

# register multiple hotkeys
keyboard.add_hotkey('ctrl+s', save_function)
keyboard.add_hotkey('ctrl+q', quit_function)
keyboard.add_hotkey('ctrl+h', hello_function)

print("Hotkeys registered:")
print("Ctrl+S - Save function")
print("Ctrl+H - Hello function")
print("Ctrl+Q - Quit program")
print("\nPress hotkeys to test...")

# wait for keyboard events
keyboard.wait()

Explanation

• We define multiple callback functions for different hotkey combinations.

• The keyboard.add_hotkey() function accepts combination keys using the '+' separator (e.g., 'ctrl+s').

• The keyboard.unhook_all() function removes all registered hotkeys before exiting.

• Multiple hotkeys can be registered and will work simultaneously.

Output

When you run the code and press the key combinations, you will see ?

Hotkeys registered:
Ctrl+S - Save function
Ctrl+H - Hello function  
Ctrl+Q - Quit program

Press hotkeys to test...
Save hotkey pressed! (Ctrl+S)
Hello from Ctrl+H!
Quit hotkey pressed! (Ctrl+Q)

Common Key Names

Important Notes

• Administrator Privileges: The keyboard library requires elevated permissions on most systems.

• Cross-Platform: Key names may vary slightly between operating systems.

• Blocking Operation: keyboard.wait() blocks the main thread. Use keyboard.wait('esc') to exit on a specific key.

• Global Hotkeys: These hotkeys work system-wide, even when your program is not in focus.

Conclusion

Creating hotkeys in Python using the keyboard library is a powerful way to automate tasks and improve user experience. The library supports both single keys and key combinations, making it versatile for various applications. Remember to handle permissions properly and consider the global nature of these hotkeys in your applications.