How to Get Key Presses in Python

by Jaime Avelar

Learning how to capture each key pressed on your keyboard using Python is one way to keep a record of information you type on your computer. Python is a computer programming language that can be used to easily capture keys programmatically. One advantage about a Python program is that it runs in multiple operating systems, such as Linux\Unix, Max OS X and Windows, according to Python.com. In Python the "keysym" property is used to detect the key pressed; the “Char()” property is used to retrieve the key.

1

Launch IDLE (Python GUI), click the “File” menu and click “New Window” to launch a new window. Press “Ctrl” and “S” to launch the “Save As” dialog window. Type “getKeyPressed” next to “File name:" and click “Save.”

2

Add the following code to import the “Tkinter” namespace to your project: import Tkinter as tk

3

Copy and paste the following code to get each key pressed. def keypress(event): if event.keysym == 'Escape': mainRoot.destroy() keyPressed = event.char print "You pressed: " + keyPressed

4

Add the following code to print the key pressed using the command prompt window: mainRoot = tk.Tk() print "Press a key (Escape key to exit):" mainRoot.bind_all('<Key>', keypress) mainRoot.withdraw() mainRoot.mainloop()

5

Click the “Windows” start button and type “Cmd” in the “search programs and files” text box. Press “Enter” to open the command prompt window. Navigate to “C:\Python<version number>\” and type “python getKeyPressed.” Press “Enter” to run your program. Start typing using your keyboard to display each key pressed to the command prompt window.

About the Author

Jaime Avelar is a professional writer whose programming articles appear on various websites. He has been a software programmer since 2000. Avelar holds a Master of Science in information systems from the University of Texas at Arlington.

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