Unreal Editor Validator Concrete Implementation in Python

EditorValidatorConcrete.py

import unreal

@unreal.uclass()
class EditorValidatorConcrete(ue.EditorValidatorBase):
    def __init__(self, *arg, **kwds):
        super(EditorValidatorConcrete, self).__init__(*arg, **kwds)

    @unreal.ufunction(override=True)
    def validate_loaded_asset(self, asset, validation_errors):
        self.asset_fails(asset, "asset failed", validation_errors)
        return (unreal.DataValidationResult.INVALID, validation_errors)

    @unreal.ufunction(override=True)
    def can_validate_asset(self, asset):
        return True

if __name__ == "__main__":
    editor_validator_subsystem = unreal.get_editor_subsystem(unreal.EditorValidatorSubsystem)
    validator = EditorValidatorConcrete()
    editor_validator_subsystem.add_validator(validator)