code: def get_nearest(self, lat, lng, skip_cache=False): 
          
          lat, lng = float(lat), float(lng)
          self._check_point(lat, lng)
          return self._lookup(skip_cache, get_nearest, lat, lng)
docs: Calls `postcodes.get_nearest` but checks correctness of `lat` 
          and `long`, and by default utilises a local cache.
  
          :param skip_cache: optional argument specifying whether to skip 
                             the cache and make an explicit request.
  
          :raises IllegalPointException: if the latitude or longitude 
                                         are out of bounds.
  
          :returns: a dict of the nearest postcode's data.