按下键时记录，释放键时停止

Question

I am currently trying to make a simple python script for creating speech data.

The idea with the script is that is starts recording using pyaudio , when a key is pressed and hold down, and stops recording when the key is released.

I am currently a bit confused on how i should implement the while key hold / stop at release mechanism.

i found this library keyboard , but can't make sense whether it incorporates this form of mechanism?

Answer 1

According to this code in library "keyboard"'s source, it do provide such mechanism to detect if a key is currently pressed. so you can just do a while loop to check whether user has released that key.

#/usr/bin/python
# file: __init__.py
# ...
def is_pressed(key):
    """
    Returns True if the key is pressed.
        is_pressed(57) -> True
        is_pressed('space') -> True
        is_pressed('ctrl+space') -> True
    """
    _listener.start_if_necessary()
    if is_number(key):
        return key in _pressed_events
    elif len(key) > 1 and ('+' in key or ',' in key):
        parts = canonicalize(key)
        if len(parts) > 1:
            raise ValueError('Cannot check status of multi-step combination ({}).'.format(key))
        return all(is_pressed(part) for part in parts[0])
    else:
        for event in _pressed_events.values():
            if matches(event, key):
                return True
        return False