record_like_class_factory.py

def record_factory(cls_name, field_names):
  try:
    field_names = field_names.replace(',', ' ').split()
  except AttributeError:
    pass
  filed_names = tuple(field_names)
  
  def __init__(self, *args, **kwargs):
    attrs = dict(zip(self.__slots__, args))
    attrs.update(kwargs)
    for name, value in attrs.items():
        setattr(self, name, value)
  
  def __iter__(self):
    # generate attribute value in slots order
    for name in self.__slots__:
      yield getattr(self, name)
  
  def __repr__(self):
    values = ', '.join(f'{name}={value!r}'
        for name, value in zip(self.__slots__, self))
    cls_name = self.__class__.__name__
    return f'{cls_name}({values})'
    
  cls_attrs = dict(__slots__ = field_names,
                   __init__ = __init__,
                   __iter__ = __iter__,
                   __repr__ = __repr__,)
                   
  return type(cls_name, (object,), cls_attrs)