code: def array_type(data_types, field):
      
      from sqlalchemy.dialects import postgresql
  
      internal_type = field.base_field.get_internal_type()
  
      # currently no support for multi-dimensional arrays
      if internal_type in data_types and internal_type != 'ArrayField':
          sub_type = data_types[internal_type](field)
          if not isinstance(sub_type, (list, tuple)):
              sub_type = [sub_type]
      else:
          raise RuntimeError('Unsupported array element type')
  
      return postgresql.ARRAY(sub_type)
docs: Allows conversion of Django ArrayField to SQLAlchemy Array.
      Takes care of mapping the type of the array element.