SEAL-Python: Cannot deep copy certain seal objects

Hey there Huelse, I am having some difficulty deep copying some objects of seal-python giving me:

Traceback (most recent call last):
  File "/python-fhe/fhe/fhe.py", line 123, in _merge_dictionary
    copy.deepcopy(d)
  File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python3.8/copy.py", line 161, in deepcopy
    rv = reductor(4)
TypeError: cannot pickle 'seal.SEALContext' object

Traceback (most recent call last):
  File "/python-fhe/fhe/fhe.py", line 124, in _merge_dictionary
    dicts = copy.deepcopy(dicts)
  File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python3.8/copy.py", line 210, in _deepcopy_tuple
    y = [deepcopy(a, memo) for a in x]
  File "/usr/lib/python3.8/copy.py", line 210, in <listcomp>
    y = [deepcopy(a, memo) for a in x]
  File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python3.8/copy.py", line 161, in deepcopy
    rv = reductor(4)
TypeError: cannot pickle 'seal.PublicKey' object

Its interesting that deep copying results in a pickle of these objects.

Not sure if you know of a workaround, or anything I can help with in particular to make it possible to deep copy.

Thanks as usual.

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 24 (24 by maintainers)

Most upvoted comments

You need the stl_bind, there are a lot of examples in pybind11’s tests - https://github.com/pybind/pybind11/blob/master/tests/test_stl_binders.cpp But I think it’s unnecessary, there is a simple way to pickle the EncryptionParameters The point is the keys and ciphertext. Here is: https://github.com/Huelse/SEAL-Python/commit/70fc82b8b996076e6ea9a3511fff18ee8cf76af6

Huelse on May 28, 2020