$ pyuavcan call 42 uavcan.register.Access.1.0 '{name: uavcan.pub.measurement}' --tr='CAN(can.media.socketcan.SocketCANMedia("vcan0", 8), 125)'
Error: ValueError: dictionary update sequence element #0 has length 1; 2 is required
2020-06-06 02:38:40 917151 INFO pyuavcan._cli._main: Unhandled exception: dictionary update sequence element #0 has length 1; 2 is required
Traceback (most recent call last):
File "/home/pavel/.local/lib/python3.8/site-packages/pyuavcan/_cli/_main.py", line 24, in main
exit(_main_impl())
File "/home/pavel/.local/lib/python3.8/site-packages/pyuavcan/_cli/_main.py", line 50, in _main_impl
result = args.func(args)
File "/home/pavel/.local/lib/python3.8/site-packages/pyuavcan/_cli/_main.py", line 149, in execute
return cmd.execute(args, subsystems)
File "/home/pavel/.local/lib/python3.8/site-packages/pyuavcan/_cli/commands/call.py", line 126, in execute
request = pyuavcan.dsdl.update_from_builtin(dtype.Request(), args.field_spec)
File "/home/pavel/.local/lib/python3.8/site-packages/pyuavcan/dsdl/_builtin_form.py", line 149, in update_from_builtin
update_from_builtin(field_obj, value)
File "/home/pavel/.local/lib/python3.8/site-packages/pyuavcan/dsdl/_builtin_form.py", line 129, in update_from_builtin
source = dict(source) # Create copy to prevent mutation of the original
ValueError: dictionary update sequence element #0 has length 1; 2 is required
The error message is super hard to parse. What it is trying to say is that it found a string 'uavcan.pub.measurement' where it expected a dictionary representing a composite. The correct form would be:
An easy mistake:
The error message is super hard to parse. What it is trying to say is that it found a string
'uavcan.pub.measurement'where it expected a dictionary representing a composite. The correct form would be:I.e.:
{name: uavcan.pub.measurement}->{name: {name: uavcan.pub.measurement}}