CODEWITHSUNDEEP
pythonpynput
WamboRambo
WamboRambo

Reputation: 25

Pynput: Count keypresses

I want to write a program which counts, how often a key is pressed on my keyboard (e.g. per day). I can use Pynput to recognize a certain keypress, but I'm struggling with the counting part. Here's what I got so far:

from pynput.keyboard import Key, Listener
i = 0
def on_press(key, pressed):
    print('{0} pressed'.format(
        key))
    if pressed({0}):
        i = i + 1
        
def on_release(key):
    if key == Key.esc: 
        # Stop listener
        return False

# Collect events until released 
with Listener( 
        on_press=on_press,
        on_release=on_release) as listener:
    listener.join()

That executes the following error: TypeError: on_press() missing 1 required positional argument: 'pressed'

I also don't know how to seperate all 26 letters and am not really sure what to do now...does anyone have an idea?

Upvotes: 0

Views: 1166

Answers (3)

atharva jadhav
atharva jadhav

Reputation: 11

I wrote a new script using pynput that uses dictionary to count the number of key presses. The script runs until you press "esc" key.

from pynput.keyboard import Key
from pynput import keyboard

d = {}

def on_press(key):
    if hasattr(key,'char'):

        global d
        d[key] = d.get(key,0) + 1

        print(f'{key} pressed')
        print(d)

    elif key == Key.esc: 
        listener.stop()
    
listener = keyboard.Listener(on_press=on_press)
listener.start()

while True:
    pass

Upvotes: 0

Anand
Anand

Reputation: 1

from pynput import keyboard

c=0
with keyboard.Events() as events:
    for event in events:
        if event.key == keyboard.Key.esc:
            break
        elif (str(event)) == "Press(key='1')":
                c+=1
                print(c)

You can use any keys inside "Press(key='1')" like "Press(key='2')" , "Press(key='q')"

Upvotes: 0

Excelsiur
Excelsiur

Reputation: 41

I'm trying to figure this exact problem out myself. To answer what the error wants, it wants you to define the parameter "pressed" in your arguments passed to on_press.

ex.

    def on_press(key, pressed=0):
        print('{0} pressed'.format(
            key))
        if pressed({0}):
            i = i + 1

your i = 0 above that block is out of scope for the on_press block, and therefore cannot be used.

The problem I'm having is, I can get it to count the keystrokes recursively, however it doesn't stop and goes to the max recursion depth with just one keystroke!

I'll reply again if I make any progress. Good luck to you as well!

--- I figured it out! --- The following link to another StackOverflow post led me in the right direction: Checking a specific key with pynput in Python

Here's my code. It will display the character typed and increment the count of keys typed:

    from pynput.keyboard import Key, Listener

    strokes = 0


    def on_press(key):
        if key == Key.esc:
            return False
        print('{0} pressed'.format(
            key))
        global strokes
        strokes += 1
        print(strokes)


    with Listener(
            on_press=on_press) as listener:
        listener.join()

I hope this helps!

Upvotes: 1

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