KeyError exception on cam.get_focus_mode() with Birddog X1 camera

[DanTappan]

Problem:
calling the get_focus_mode() method with Birddog X1 camera results in a KeyError exception

Diagnosis:
The Birddog X1 does not currently implement the GETFOCUSMODE (0x04 0x38) INQUIRY. Instead it returns a generic reply. Doing a dict lookup based on the last byte of the reply (which seems to be an ascii 'A') causes a KeyError.

Possible fix:
Adding a try/except around the dict index makes the code more robust and avoids the problem

def get_focus_mode(self) -> str:
    """:return: either 'auto' or 'manual'"""
    modes = {2: 'auto', 3: 'manual'}
    response = self._send_command('04 38', query=True)
    try:
        mode = modes[response[-1]]
    except KeyError:
        mode = 'unknown'
    return mode

[misterhay]

Great suggestion