Cannot catch adb_shell.exceptions.UsbDeviceNotFoundError

[threadreaper]

Cannot catch adb_shell.exceptions.UsbDeviceNotFoundError

[JeffLIrion]

Change except exceptions.UsbDeviceNotFoundError: to except adb_shell.exceptions.UsbDeviceNotFoundError:

[threadreaper]

Already tried that, as I detailed above.

[JeffLIrion]

The name exceptions is not defined. It's the same as if you did this:

try:
    1/0
except exceptions.Something:
    print("Caught!")

---------------------------------------------------------------------------
ZeroDivisionError                         Traceback (most recent call last)
<ipython-input-1-12d64cb3b5d5> in <module>()
      1 try:
----> 2     1/0
      3 except exceptions.Something:

ZeroDivisionError: division by zero

During handling of the above exception, another exception occurred:

NameError                                 Traceback (most recent call last)
<ipython-input-1-12d64cb3b5d5> in <module>()
      1 try:
      2     1/0
----> 3 except exceptions.Something:
      4     print("Caught!")
      5 

NameError: name 'exceptions' is not defined

[threadreaper]

That was my inclination as well, but again, I have already tried that. But the error I'm getting is not related to exceptions not being defined. Here's the complete error message:

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/adb_shell/transport/usb_transport.py", line 597, in _find_first
    return next(cls._find_devices(setting_matcher, device_matcher=device_matcher, usb_info=usb_info, default_transport_timeout_s=default_transport_timeout_s))
StopIteration

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/michael/projects/HUprojects/scatter/shell.py", line 22, in <module>
    device = AdbDeviceUsb()
  File "/usr/lib/python3.8/site-packages/adb_shell/adb_device.py", line 1200, in __init__
    transport = UsbTransport.find_adb(serial, port_path, default_transport_timeout_s)
  File "/usr/lib/python3.8/site-packages/adb_shell/transport/usb_transport.py", line 620, in find_adb
    return cls._find(
  File "/usr/lib/python3.8/site-packages/adb_shell/transport/usb_transport.py", line 507, in _find
    return cls._find_first(setting_matcher, device_matcher, usb_info=usb_info, default_transport_timeout_s=default_transport_timeout_s)
  File "/usr/lib/python3.8/site-packages/adb_shell/transport/usb_transport.py", line 599, in _find_first
    raise exceptions.UsbDeviceNotFoundError('No device available, or it is in the wrong configuration.')
adb_shell.exceptions.UsbDeviceNotFoundError: No device available, or it is in the wrong configuration.

As you can see, no reference to exceptions not being defined.

This is my try/except block currently:

try:
    device.connect(rsa_keys=[signer], auth_timeout_s=0.1)
except adb_shell.exceptions.UsbDeviceNotFoundError:
    print('Error: Device.not found')
    sys.exit(1)
except usb1.USBErrorBusy:
    os.system('adb kill-server')
    device.connect(rsa_keys=[signer], auth_timeout_s=0.1)
finally:
    if device.available:
        print("Device successfully connected.")

[JeffLIrion]

The traceback is what I needed to see. You didn't get a "name is not defined" error because the code never got that far.

  File "/home/michael/projects/HUprojects/scatter/shell.py", line 22, in <module>
    device = AdbDeviceUsb()

This is where your exception occurred. It's looking for the USB device, but it doesn't find it.

Unfortunately, I don't know the solution. Catching the exception won't help because if it can't find the USB device then nothing after that will work. Maybe if you kill the ADB server first it would work?

This is why USB support is marked as experimental. If you figure out how the solution, please share it!

[threadreaper]

Oh geez, now I feel dumb. I don't know how I managed to overlook this. All I needed to do was add:

try:
    device = AdbDeviceUsb()
except adb_shell.exceptions.UsbDeviceNotFoundError:
    print('Error: Device not found')
    sys.exit(1)

This handles the error condition I was looking for. I was so sure it was coming from the device.connect() attempt I wasn't reading the traceback as closely as I should have. Thank you for your assistance.