code: def lookup_id(
              self,
              ra,
              dec):
          
          self.log.debug('starting the ``lookup_id`` method')
  
          from astrocalc.coords import coordinates_to_array
          raArray, decArray = coordinates_to_array(
              log=self.log,
              ra=ra,
              dec=dec
          )
  
          self.log.debug('completed the ``lookup_id`` method')
          return super(HTM, self).lookup_id(raArray, decArray)
docs: *Lookup the ID of HTM trixel that a coordinate or lists of coordinates lie on*
  
          **Key Arguments:**
              - ``ra`` -- list, numpy array or single ra value (first coordinate set)
              - ``dec`` -- list, numpy array or single dec value (first coordinate set - must match ra1 array length)
  
          **Return:**
              - ``htmIds`` -- a list of HTM trixel ids the coordinates lie on
  
          **Usage:**
  
              To find the trixel IDs that a set of coordinate lie on:
  
              .. code-block:: python
  
                  raList1 = ["13:20:00.00", 200.0, "13:20:00.00", 175.23, 21.36]
                  decList1 = ["+24:18:00.00",  24.3,  "+24:18:00.00",  -28.25, -15.32]
  
                  htmids = mesh.lookup_id(raList1, decList1)
                  for h, r, d in zip(htmids, raList1, decList1):
                      print r, d, " --> ", h