importcollectionsimportcopyimportdataclasses@dataclasses.dataclassclassModelOutputDictBase(dict):a:intb:int=2# workscopy.deepcopy(ModelOutputDictBase(a=1,b=2,    ))@dataclasses.dataclassclassModelOutputAllDefaults(collections.OrderedDict):a:int=1b:int=2# workscopy.deepcopy(ModelOutputAllDefaults(a=1,b=2,    ))@dataclasses.dataclassclassModelOutput(collections.OrderedDict):a:intb:int=2# failscopy.deepcopy(ModelOutput(a=1,b=2,    ))

---------------------------------------------------------------------------TypeError                                 Traceback (most recent call last)Cell In[4], line 3935     a:int36     b:int=2---> 39 copy.deepcopy(40     ModelOutput(41         a=1,42         b=2,43     )44 )File [...lib/python3.8/copy.py:172), in deepcopy(x, memo, _nil)170                 y= x171else:--> 172                 y = _reconstruct(x, memo, *rv)174# If is its own copy, don't memoize.175if yisnot x:File [.../lib/python3.8/copy.py:264), in _reconstruct(x, memo, func, args, state, listiter, dictiter, deepcopy)262if deepand args:263     args= (deepcopy(arg, memo)for argin args)--> 264 y = func(*args)265if deep:266     memo[id(x)]= yTypeError:__init__() missing 1 required positional argument: 'a'