Adding Class Representer to YAML Results in Nonsense Error about pyscript HOT 4 CLOSED

from enum import Enum, Flag, auto
import yaml
Action = Flag('Action', ['Press', 'Hold', 'TerminateHold', 'Indeterminate', 'Up', 'Down', 'Left', 'Right', 'Center'])

def Action_constructor(loader, node):
    value = loader.construct_scalar(node)
    values = value.split('|')
    action_obj = Action(0)
    for action in values:
        action_obj |= Action[action] 
    return action_obj
yaml.add_constructor(u'!Action', Action_constructor)

In [28]: yaml.load("!Action 'Hold|TerminateHold'\n", Loader=yaml.FullLoader)
['Hold', 'TerminateHold']
Out[28]: <Action.TerminateHold|Hold: 6>

log.info(yaml.load("!Action 'Hold'", Loader=yaml.Loader))
->
2023-10-23 22:38:36.544 INFO (MainThread) [custom_components.pyscript.file.example.async_foo] <coroutine object EvalFuncVar.__call__ at 0x7f7477c220>

@pyscript_compile
def test_func():
    def Action_representer(dumper, data: Action | ActionMode):
        """
        Custom representer for an enum.Flag subclass 'Action' to enable customized YAML dumping.
        The function works by:
        converting the binary representation of the Action value into a set of power-of-two components,
        joining their corresponding Action names with '|',
        and then representing the result as a scalar in the YAML format
        Args:
        dumper: YAML dumper instance.
        data (Action): The Action object to be represented in the YAML format.
        Returns:
        Represents the Action object as a scalar in the custom YAML format.
        """
        class_name = f"!{data.__class__.__name__}"
        binary_str = bin(data.value)[2:][::-1]
        binary_pieces = [2**(i+0) for i, bit in enumerate(binary_str) if bit == '1']
        repr_str = '|'.join([Action(x).name for x in binary_pieces])
        return dumper.represent_scalar(class_name, repr_str)
    yaml.add_representer(Action, Action_representer)
    yaml.add_representer(ActionMode, Action_representer)

    def Action_constructor(loader, node):
        value = loader.construct_scalar(node)
        values = value.split('|')
        action_obj = Action(0)
        for action in values:
            action_obj |= Action[action] 
        return action_obj
    yaml.add_constructor(u'!Action', Action_constructor)