Unable to parse BusState from config.ini #1956

Describe the bug

I'm attempting to read a configuration from %APPDATA%\can.ini, specifically this config from the documentation for the PCAN Basic API:

[default]
interface = pcan
channel = PCAN_USBBUS1
state = can.bus.BusState.PASSIVE
bitrate = 500000

Rather than interpret the state config as an enum value, python-can seems to treat it as a string, so fails with:

ValueError: BusState must be Active or Passive

To Reproduce

Try to instantiate can.Bus() with the above config in %APPDATA%\can.ini.

Expected behavior

state = can.bus.BusState.PASSIVE is interpreted as the enum value rather than the string 'can.bus.BusState.PASSIVE'.

Additional context

OS and version: Windows 11 Pro 24H2
Python version: 3.13.4
python-can version: 4.5.0
python-can interface/s (if applicable): PCAN Basic API