Comments (4)
There are protocols 0..4 (inclusive). Maybe I could bump upper range in these places?
gen_pickles.py
conftest.py
ps after mentioned +1 number of tests turn from 36 to 44. And they pass
from multidict.
Regarding the issue itself..
Could you share some thoughts about desirable implementation?
Does it involve custom logic in __getnewargs__
, __reduce__
and a bunch of other magic methods depending on USE_CYTHON
variable?
from multidict.
My idea is to look on CPython sources.
Unfortunately, that's it for now
from multidict.
Here is what I got playing around with special methods related to pickle protocol:
import pickle
USE_CYTHON = True
# USE_CYTHON = False
class A:
def __getnewargs_ex__(self):
# print('in __getnewargs_ex__ of A')
if USE_CYTHON:
print('selecting path B')
return ((B,), {})
else:
print('selecting path A')
return ((A,), {})
def __new__(cls, *args, **kwargs):
# print('In A __new__, *args, **kwargs: ', *args, **kwargs)
if args:
return args[0]()
else:
return super().__new__(cls)
class B: pass
if __name__ == '__main__':
obj = A()
pd = pickle.dumps(obj)
pl = pickle.loads(pd)
# USE_CYTHON = True USE_CYTHON = False
print(pl.__class__) # <class '__main__.B'> or <class '__main__.A'>
from multidict.
Related Issues (20)
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from multidict.