deserialize error

[xyanb]

Can I ask for a help on this error when I tried to deserialize a trained model:

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/model/predictor.py in deserialize(cls, path, **kwargs)
    117 
    118         # call deserialize() for the concrete Predictor type
--> 119         return tpe.deserialize(path, **kwargs)
    120 
    121     @classmethod

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/mx/model/predictor.py in deserialize(cls, path, ctx)
    383             # deserialize transformation chain
    384             with (path / "input_transform.json").open("r") as fp:
--> 385                 transform = load_json(fp.read())
    386 
    387             # deserialize prediction network

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_json.py in load_json(s)
     75         Inverse function.
     76     """
---> 77     return decode(json.loads(s))

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    290 
    291         args = decode(r.get("args", []))
--> 292         kwargs = decode(r.get("kwargs", {}))
    293 
    294         if kind == Kind.Instance:

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    303 
    304     if type(r) == dict:
--> 305         return valmap(decode, r)
    306 
    307     if type(r) == list:

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/toolz/dicttoolz.py in valmap(func, d, factory)
     81     """
     82     rv = factory()
---> 83     rv.update(zip(d.keys(), map(func, d.values())))
     84     return rv
     85 

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    306 
    307     if type(r) == list:
--> 308         return list(map(decode, r))
    309 
    310     return r

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    290 
    291         args = decode(r.get("args", []))
--> 292         kwargs = decode(r.get("kwargs", {}))
    293 
    294         if kind == Kind.Instance:

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    303 
    304     if type(r) == dict:
--> 305         return valmap(decode, r)
    306 
    307     if type(r) == list:

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/toolz/dicttoolz.py in valmap(func, d, factory)
     81     """
     82     rv = factory()
---> 83     rv.update(zip(d.keys(), map(func, d.values())))
     84     return rv
     85 

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    306 
    307     if type(r) == list:
--> 308         return list(map(decode, r))
    309 
    310     return r

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/serde/_base.py in decode(r)
    293 
    294         if kind == Kind.Instance:
--> 295             return cls(*args, **kwargs)
    296 
    297         if kind == Kind.Stateful:

~/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/gluonts/core/component.py in init_wrapper(*args, **kwargs)
    343                 self.__class__.__repr__ = validated_repr
    344 
--> 345             return init(self, **all_args)
    346 
    347         # attach the Pydantic model as the attribute of the initializer wrapper

TypeError: __init__() got an unexpected keyword argument 'normalized'

[lostella]

@xyanb is this a model you serialized with gluonts<0.7 and you are de-serializing with gluonts==0.7? That may not work because of some breaking change that were introduced.

The fix is to de-serialize using the same version of gluonts that was used for serialization.

[xyanb]

Thanks. This solves the problem!