can't deepcopy JsonDicts (and other containers)

[czue]

not sure if this is an issue or expected behavior

>>> from jsonobject import *
>>> import copy
>>> class Obj(JsonObject):
...   foo = DictProperty()
... 
>>> obj = Obj(foo={"some": "value"})
>>> copy.deepcopy(obj.foo)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/copy.py", line 190, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/usr/lib/python2.7/copy.py", line 334, in _reconstruct
    state = deepcopy(state, memo)
  File "/usr/lib/python2.7/copy.py", line 163, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.7/copy.py", line 257, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.7/copy.py", line 190, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/usr/lib/python2.7/copy.py", line 334, in _reconstruct
    state = deepcopy(state, memo)
  File "/usr/lib/python2.7/copy.py", line 163, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.7/copy.py", line 257, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.7/copy.py", line 190, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/usr/lib/python2.7/copy.py", line 334, in _reconstruct
    state = deepcopy(state, memo)
  File "/usr/lib/python2.7/copy.py", line 163, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.7/copy.py", line 257, in _deepcopy_dict
    y[deepcopy(key, memo)] = deepcopy(value, memo)
  File "/usr/lib/python2.7/copy.py", line 163, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.7/copy.py", line 230, in _deepcopy_list
    y.append(deepcopy(a, memo))
  File "/usr/lib/python2.7/copy.py", line 163, in deepcopy
    y = copier(x, memo)
  File "/usr/lib/python2.7/copy.py", line 237, in _deepcopy_tuple
    y.append(deepcopy(a, memo))
  File "/usr/lib/python2.7/copy.py", line 174, in deepcopy
    y = copier(memo)
TypeError: cannot deepcopy this pattern object

[dannyroberts]

@esoergel looks like this was introduced between jsonobject 0.4 and 0.6 according to dimagi/commcare-hq#4647 (comment). If this is fixed within a week, is that fast enough?

[dannyroberts]

Also according to dimagi/commcare-hq@ff67f36#commitcomment-10420066, copy.deepcopy(obj) works just fine, but copy.deepcopy(obj.foo) fails

[esoergel]

@dannyroberts I need to do a bit more digging to figure the rest of the issue out, but I'm hoping to be able to circumvent the issue altogether, in which case the timing is less critical.

[trentgerman]

Any progress on this one?

[dannyroberts]

Looks from the conversation history that we dropped it without a timeline to complete. As a workaround, Obj.wrap(obj.to_json()) is conceptually equivalent, although I realize you may not have access to the code that makes the call to deepcopy.