class BuiltinConcepts:
    SHEERKA = "__SHEERKA"

    NEW_CONCEPT = "__NEW_CONCEPT"  # when the definition of a new concept is added
    UNKNOWN_CONCEPT = "__UNKNOWN_CONCEPT"  # Failed to find the requested concept
    USER_INPUT = "__USER_INPUT"  # user command
    PARSER_INPUT = "__PARSER_INPUT"  # command that will be parsed
    PYTHON_CODE = "__PYTHON_CODE"  # command that is parsed

    INVALID_CONCEPT = "__INVALID_CONCEPT"  # failed to parse concept attributes
    EVALUATION_ERROR = "__EVALUATION_ERROR"  # failed to evaluate concept