Get attribute dict from flattened forecast dict.

def _forecast_transform(f_d):
    """Get attribute dict from flattened forecast dict."""
    begins = f_d.get('localTimestamp', None)
    issued = f_d.get('issueTimestamp', None)
    solid_stars = f_d.get('solidRating', None)
    faded_stars = f_d.get('fadedRating', None)
    air_pressure = f_d.get('condition_pressure', None)
    unit_pressure = f_d.get('condition_unitPressure', None)
    air_temp = f_d.get('condition_temperature', None)
    unit_temp = f_d.get('condition_unit', None)
    max = f_d.get('swell_maxBreakingHeight', None)
    abs_max = f_d.get('swell_absMaxBreakingHeight', None)
    min = f_d.get('swell_minBreakingHeight', None)
    abs_min = f_d.get('swell_absMinBreakingHeight', None)
    swell_dir = f_d.get('swell_components_combined_compassDirection', None)
    swell_unit = f_d.get('swell_unit', None)
    probability = f_d.get('swell_probability', None)
    period = f_d.get('swell_components_combined_period', None)
    wind_chill = f_d.get('wind_chill', None)
    wind_gusts = f_d.get('wind_gusts', None)
    wind_direction = f_d.get('wind_compassDirection', None)
    wind_degrees = f_d.get('wind_direction', None)
    wind_speed = f_d.get('wind_speed', None)
    wind_unit = f_d.get('wind_unit', None)

    return {
            'air_pressure': "{}{}".format(air_pressure, unit_pressure),
            'air_temp': "{}° {}".format(air_temp, unit_temp),
            'stars': "{} solid, {} faded".format(solid_stars, faded_stars),
            'begins': dt.utcfromtimestamp(begins).strftime("%a %-I %p"),
            'issued': dt.utcfromtimestamp(issued).strftime("%a %-I %p"),
            'max_breaking_height': "{} {}".format(max, swell_unit),
            'min_breaking_height': "{} {}".format(min, swell_unit),
            'probability': "{}%".format(probability),
            'swell_direction': "{}".format(swell_dir),
            'swell_period': "{} seconds".format(period),
            'wind_chill': "{}°".format(wind_chill),
            'wind_direction': "{}° {}".format(wind_degrees, wind_direction),
            'wind_gusts': "{} {}".format(wind_gusts, wind_unit),
            'wind_speed': "{} {}".format(wind_speed, wind_unit),
            }