robotpy-cscore on SystemCore

[auscompgeek]

When I deploy the QuickVision example, I get an error from wpilib.CameraServer.launch:

22:01:02:107 INFO    : wpilib.cs           : Launching CameraServer process
22:01:02:109 ERROR   : your.robot          : Unhandled exception
Traceback (most recent call last):
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
AttributeError: module 'hal' has no attribute 'report'
Locals at innermost frame:
{'cls': <class 'wpilib.cameraserver.CameraServer'>, 'vision_py': None, 'RobotBase': <class 'wpili...
Traceback (most recent call last):
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
AttributeError: module 'hal' has no attribute 'report'
Warning at /home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py.80:launch: Unhandled exception
Traceback (most recent call last):
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
AttributeError: module 'hal' has no attribute 'report'
22:01:02:114 ERROR   : robotpy             : The robot program quit unexpectedly. This is usually due to a code error.
The above stacktrace can help determine where the error occurred.
Traceback (most recent call last):
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 160, in start
    return self._start(robot_cls)
           ~~~~~~~~~~~^^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
AttributeError: module 'hal' has no attribute 'report'
Locals at innermost frame:
{'cls': <class 'wpilib.cameraserver.CameraServer'>, 'vision_py': None, 'RobotBase': <class 'wpili...
Traceback (most recent call last):
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 160, in start
    return self._start(robot_cls)
           ~~~~~~~~~~~^^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 160, in start
    return self._start(robot_cls)
           ~~~~~~~~~~~^^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
AttributeError: module 'hal' has no attribute 'report'
Warning at /home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py.80:launch: The robot program quit unexpectedly. This is usually due to a code error.
The above stacktrace can help determine where the error occurred.
Traceback (most recent call last):
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 160, in start
    return self._start(robot_cls)
           ~~~~~~~~~~~^^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 160, in start
    return self._start(robot_cls)
           ~~~~~~~~~~~^^^^^^^^^^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/_impl/start.py", line 242, in _start
    self.robot.startCompetition()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/py/robot.py", line 20, in robotInit
    CameraServer().launch()
    ~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/wpilib/cameraserver.py", line 80, in launch
    hal.report(hal.tResourceType.kResourceType_PCVideoServer, 0x52)
    ^^^^^^^^^^
AttributeError: module 'hal' has no attribute 'report'

(yes, the stack trace is really repeated that many times)

After fixing the hal.report errors, I get this stack trace from cscore:

Traceback (most recent call last):
  File "<frozen runpy>", line 189, in _run_module_as_main
  File "<frozen runpy>", line 148, in _get_module_details
  File "<frozen runpy>", line 112, in _get_module_details
  File "/home/systemcore/venv/lib/python3.13/site-packages/cscore/__init__.py", line 4, in <module>
    from ._cscore import (
    ...<21 lines>...
    )
ImportError: /home/systemcore/venv/lib/python3.13/site-packages/cscore/_cscore.cpython-313-aarch64-linux-gnu.so: undefined symbol: WPI_Impl_SetupNowUseDefaultOnRio
22:07:16:060 WARNING : wpilib.cs           : CameraServer process exited with exitcode 1

[auscompgeek]

I worked around the undefined symbol by installing the manylinux aarch64 wheel published to PyPI instead of the systemcore wheel.

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/home/systemcore/venv/lib/python3.13/site-packages/cscore/__main__.py", line 170, in <module>
    main()
    ~~~~^^
  File "/home/systemcore/venv/lib/python3.13/site-packages/cscore/__main__.py", line 124, in main
    ntinst.startClient4(args.nt_identity)
    ^^^^^^^^^^^^^^^^^^^
AttributeError: 'ntcore._ntcore.NetworkTableInstance' object has no attribute 'startClient4'. Did you mean: 'startClient'?

I was able to reproduce the above error on my x86-64 laptop too.

After fixing the above error, I managed to get a camera stream from my PS Eye 🎉