Dill can't pickle abstractproperty, abstractclassmethod, or abstractstaticmethod objects #365
Description
The following:
import abc
import dill
print(dill.__version__) # 0.3.1.1
class FooBar(abc.ABC):
@abc.abstractproperty
def thingy(self):
return 42
dill.dumps(FooBar)fails with:
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-4-ad16237f3136> in <module>
----> 1 dill.dumps(FooBar)
~/.venvs/dill/lib/python3.7/site-packages/dill/_dill.py in dumps(obj, protocol, byref, fmode, recurse, **kwds)
263 """pickle an object to a string"""
264 file = StringIO()
--> 265 dump(obj, file, protocol, byref, fmode, recurse, **kwds)#, strictio)
266 return file.getvalue()
267
~/.venvs/dill/lib/python3.7/site-packages/dill/_dill.py in dump(obj, file, protocol, byref, fmode, recurse, **kwds)
257 _kwds = kwds.copy()
258 _kwds.update(dict(byref=byref, fmode=fmode, recurse=recurse))
--> 259 Pickler(file, protocol, **_kwds).dump(obj)
260 return
261
~/.venvs/dill/lib/python3.7/site-packages/dill/_dill.py in dump(self, obj)
443 raise PicklingError(msg)
444 else:
--> 445 StockPickler.dump(self, obj)
446 stack.clear() # clear record of 'recursion-sensitive' pickled objects
447 return
/usr/lib/python3.7/pickle.py in dump(self, obj)
435 if self.proto >= 4:
436 self.framer.start_framing()
--> 437 self.save(obj)
438 self.write(STOP)
439 self.framer.end_framing()
/usr/lib/python3.7/pickle.py in save(self, obj, save_persistent_id)
502 f = self.dispatch.get(t)
503 if f is not None:
--> 504 f(self, obj) # Call unbound method with explicit self
505 return
506
~/.venvs/dill/lib/python3.7/site-packages/dill/_dill.py in save_type(pickler, obj)
1339 del _dict[name]
1340 pickler.save_reduce(_create_type, (type(obj), obj.__name__,
-> 1341 obj.__bases__, _dict), obj=obj)
1342 log.info("# %s" % _t)
1343 # special cases: NoneType
/usr/lib/python3.7/pickle.py in save_reduce(self, func, args, state, listitems, dictitems, obj)
636 else:
637 save(func)
--> 638 save(args)
639 write(REDUCE)
640
/usr/lib/python3.7/pickle.py in save(self, obj, save_persistent_id)
502 f = self.dispatch.get(t)
503 if f is not None:
--> 504 f(self, obj) # Call unbound method with explicit self
505 return
506
/usr/lib/python3.7/pickle.py in save_tuple(self, obj)
787 write(MARK)
788 for element in obj:
--> 789 save(element)
790
791 if id(obj) in memo:
/usr/lib/python3.7/pickle.py in save(self, obj, save_persistent_id)
502 f = self.dispatch.get(t)
503 if f is not None:
--> 504 f(self, obj) # Call unbound method with explicit self
505 return
506
~/.venvs/dill/lib/python3.7/site-packages/dill/_dill.py in save_module_dict(pickler, obj)
910 # we only care about session the first pass thru
911 pickler._session = False
--> 912 StockPickler.save_dict(pickler, obj)
913 log.info("# D2")
914 return
/usr/lib/python3.7/pickle.py in save_dict(self, obj)
857
858 self.memoize(obj)
--> 859 self._batch_setitems(obj.items())
860
861 dispatch[dict] = save_dict
/usr/lib/python3.7/pickle.py in _batch_setitems(self, items)
883 for k, v in tmp:
884 save(k)
--> 885 save(v)
886 write(SETITEMS)
887 elif n:
/usr/lib/python3.7/pickle.py in save(self, obj, save_persistent_id)
522 reduce = getattr(obj, "__reduce_ex__", None)
523 if reduce is not None:
--> 524 rv = reduce(self.proto)
525 else:
526 reduce = getattr(obj, "__reduce__", None)
TypeError: can't pickle abstractproperty objects
abstractclassmethod and abstractstaticmethod also fail in the same way.