I am trying to create a start and stop button with a keyboard press

Question

I am using the keyboard library to create a button that starts and stops with the press of a button and I keep getting errors this is the code

while True:
    if keyboard.on_press('esc') == True:
        if start == 0:
            start = 1
        else:
            start = 0
    while start == 1:
        print('yes')
        sleep(1)

and this is the error im getting while pressing the 'p' key

yes
yes
Traceback (most recent call last):
  File "C:\Users\olawa\PycharmProjects\dj4e\venv\lib\site-packages\keyboard\_generic.py", line 22, in invoke_handlers
    if handler(event):
  File "C:\Users\olawa\PycharmProjects\dj4e\venv\lib\site-packages\keyboard\__init__.py", line 474, in <lambda>
    return hook(lambda e: e.event_type == KEY_UP or callback(e), suppress=suppress)
TypeError: 'str' object is not callable

The Thonnu · Answer 1 · 2022-07-23T19:45:56.887

2

You need to pass a function to keyboard.on_press

Try:

def pressed(key):
    if key.name == 'esc':
        # Do something here

keyboard.on_press(pressed)

while True:
    # Do something else while you wait

edited Jul 23 '22 at 19:45

answered Jul 23 '22 at 19:28

The Thonnu

3,578
2
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30

would it be if key == ... or while key ==... – Timmykiller5 Jul 23 '22 at 19:30
It would be `if`. Just add a while loop after this code (edited my answer with this) – The Thonnu Jul 23 '22 at 19:31
i am sorry if im asking dumb questions, but i don't still understand you – Timmykiller5 Jul 23 '22 at 19:33
What the `on_press` function does is it calls `pressed` when a key is pressed. You then only need a `while` loop to keep the code going. – The Thonnu Jul 23 '22 at 19:35
The callback gets a `KeyboardEvent` that has `name`, `code` and `time` members. You'll need `key.name == 'esc'`. – Mark Tolonen Jul 23 '22 at 19:45
Thanks, I haven't used the keyboard library much. – The Thonnu Jul 23 '22 at 19:46
1

I've never used it either. I just read the documentation – Mark Tolonen Jul 23 '22 at 19:47

Timmykiller5 · Answer 2 · 2022-07-23T20:53:11.227

0

it works now thanks

start = 1

def pressed(key):
    global start
    if key.name == 'esc':
        if start == 0 :
            start = 1
        elif start == 1:
            start = 0

keyboard.on_press(pressed)

while start == 1:
    print('yes')
    time.sleep(1)

edited Jul 23 '22 at 20:53

answered Jul 23 '22 at 20:12

Timmykiller5

1
1

I think you need `global start` underneath `def pressed(key):` – The Thonnu Jul 23 '22 at 20:16
Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jul 24 '22 at 19:54

I am trying to create a start and stop button with a keyboard press

2 Answers2