def timedelta(self, time_input1, time_input2):
        """ Calculates time delta between two time expressions.

        Args:
            time_input1 (string): The time input string (see formats above).
            time_input2 (string): The time input string (see formats above).

        Returns:
            (dict): Dict with delta values.
        """
        time_input1 = self.any_to_datetime(time_input1)
        time_input2 = self.any_to_datetime(time_input2)

        diff = time_input1 - time_input2  # timedelta
        delta = relativedelta(time_input1, time_input2)  # relativedelta

        # totals
        total_months = (delta.years * 12) + delta.months
        total_weeks = (delta.years * 52) + (total_months * 4) + delta.weeks
        total_days = diff.days  # handles leap days
        total_hours = (total_days * 24) + delta.hours
        total_minutes = (total_hours * 60) + delta.minutes
        total_seconds = (total_minutes * 60) + delta.seconds
        total_microseconds = (total_seconds * 1000) + delta.microseconds
        return {
            'datetime_1': time_input1.isoformat(),
            'datetime_2': time_input2.isoformat(),
            'years': delta.years,
            'months': delta.months,
            'weeks': delta.weeks,
            'days': delta.days,
            'hours': delta.hours,
            'minutes': delta.minutes,
            'seconds': delta.seconds,
            'microseconds': delta.microseconds,
            'total_months': total_months,
            'total_weeks': total_weeks,
            'total_days': total_days,
            'total_hours': total_hours,
            'total_minutes': total_minutes,
            'total_seconds': total_seconds,
            'total_microseconds': total_microseconds,
        }
Calculates time delta between two time expressions.

        Args:
            time_input1 (string): The time input string (see formats above).
            time_input2 (string): The time input string (see formats above).

        Returns:
            (dict): Dict with delta values.