Source code for openfisca_core.errors.parameter_not_found_error

class ParameterNotFoundError(AttributeError):
    """Exception raised when a parameter is not found in the parameters."""

    def __init__(self, name, instant_str, variable_name=None) -> None:
        """:param name: Name of the parameter
        :param instant_str: Instant where the parameter does not exist, in the format `YYYY-MM-DD`.
        :param variable_name: If the parameter was queried during the computation of a variable, name of that variable.
        """
        self.name = name
        self.instant_str = instant_str
        self.variable_name = variable_name
        message = f"The parameter '{name}'"
        if variable_name is not None:
            message += f" requested by variable '{variable_name}'"
        message += f" was not found in the {instant_str} tax and benefit system."
        super().__init__(message)