code: def get_datatype(object_type, propid, vendor_id=0):
      
      if _debug: get_datatype._debug("get_datatype %r %r vendor_id=%r", object_type, propid, vendor_id)
  
      # get the related class
      cls = get_object_class(object_type, vendor_id)
      if not cls:
          return None
  
      # get the property
      prop = cls._properties.get(propid)
      if not prop:
          return None
  
      # return the datatype
      return prop.datatype
docs: Return the datatype for the property of an object.