'Constructor.
Args:
friendly_name (string|func): Friendly name
field (string): value name returned in \'almanac\' dict
as returned by the WU API
value_type (string):  "record" or "normal"
wu_unit (string): unit name in WU API
icon (string): icon name or URL
unit_of_measurement (string): unit of meassurement'

def __init__(self, friendly_name, field, value_type, wu_unit, unit_of_measurement, icon):

    super().__init__(friendly_name=friendly_name, feature='almanac', value=(lambda wu: wu.data['almanac'][field][value_type][wu_unit]), unit_of_measurement=unit_of_measurement, icon=icon)
