Here I have this class definition class definition . When I run below code, it raises following errors.
sm = SaliencyMaskSlic()
operations = [('img_resize', img_resize), ('sal_mask', sm.transform)]
args_list = [{'h_size':258}, {'cropped':True}]
pre_pipeline = Pipeline(ops=operations, arg_list=args_list)
ch = ColorHist('RGB', [6,6,6], [2,2], center=True, pre_pipeline = pre_pipeline)
dill.dump(ch, open('erogol.pkl','wb'))
...
dill.loads('erogol.pkl')
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
<ipython-input-11-c8a5937780b5> in <module>()
----> 1 dill.loads('erogol.pkl')
/usr/local/lib/python2.7/dist-packages/dill/dill.pyc in loads(str)
158 """unpickle an object from a string"""
159 file = StringIO(str)
--> 160 return load(file)
161
162 # def dumpzs(obj, protocol=None):
/usr/local/lib/python2.7/dist-packages/dill/dill.pyc in load(file)
148 pik = Unpickler(file)
149 pik._main_module = _main_module
--> 150 obj = pik.load()
151 if type(obj).__module__ == _main_module.__name__: # point obj class to main
152 try: obj.__class__ == getattr(pik._main_module, type(obj).__name__)
/usr/lib/python2.7/pickle.pyc in load(self)
856 while 1:
857 key = read(1)
--> 858 dispatch[key](self)
859 except _Stop, stopinst:
860 return stopinst.value
/usr/lib/python2.7/pickle.pyc in load_appends(self)
1185 def load_appends(self):
1186 stack = self.stack
-> 1187 mark = self.marker()
1188 list = stack[mark - 1]
1189 list.extend(stack[mark + 1:])
/usr/lib/python2.7/pickle.pyc in marker(self)
872 mark = self.mark
873 k = len(stack)-1
--> 874 while stack[k] is not mark: k = k-1
875 return k
876
IndexError: list index out of range
Basically I have one class instance using another class instance inside. I also used cPickle but it raises as I dump;
TypeError: can't pickle instancemethod objects
Any idea for the solution ?
This isn't a pickling error. You can't pickle class instances with pickle
or cPickle
, but you can with dill
. Your code has a bug somewhere that's giving you an IndexError
.
Also better than your class having a dump
and load
method, you might just use dump
and load
from dill
directly... then if you are doing something complicated, you can still add a __getstate__
and __setstate__
method.
Also, your loading from a pickled file, has a bug. You are doing this:
self = dill.loads(in_path)
While you should (1) be using dill.load
instead, and (2) load to _self
, and then replace the relevant state.
_self = dill.load(in_path)
self.nbins = _self.nbins
self.mask = _self.mask
# and so on... (or update all at once using `__dict__`)
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