Run time error while reading model

[bakerwy]

Hi,

I recently modified my model and saved it. But when I try to open the saved model, error messages shown.

Since it is simple model, I looked for the reason.

It turned out, in the __init__.py in the code of one of product line, the code has been changed

before :

from modelx.serialize.jsonvalues import *

_formula = lambda run_no, mp_loc, mf_loc, block_size, mp_file_name, shk_factor, scenario, block: None

_bases = []

_allow_none = None

_spaces = []

after :

from modelx.serialize.jsonvalues import *

_formula = lambda run_no, mp_loc, mf_loc, block_size, mp_file_name, shk_factor, scenario, block: None

_bases = []

_allow_none = None

_space._parents = []

as you can see, _spaces = [] has been changed to _space._parents = [].
It works again when I change the code from _space._parents =[] to _space = []

Is there reason why the code has been change? and How can I prevent to have the same error again?

FYI, I attach full error message and model that I used

In [4]: mx.read_model('C:/modelx/HDMF/test_model_common_2')
UserWarning: Existing model 'HDMF' renamed to 'HDMF_BAK1'
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
Cell In[4], line 1
----> 1 mx.read_model('C:/modelx/HDMF/test_model_common_2')

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\core\api.py:616, in read_model(model_path, name)
    597 def read_model(model_path, name=None):
    598     """Read model from files.
    599
    600     Read model form a folder(directory) tree or a zip file ``model_path``.
   (...)
    614
    615     """
--> 616     return _serialize.read_model(_system, model_path, name=name)

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\serialize\__init__.py:102, in read_model(system, model_path, name)
     99 else:
    100     serializer = _get_serializer(1)
--> 102 model = serializer.ModelReader(system, path).read_model(**kwargs)
    103 model.path = path
    104 return model

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\serialize\serializer_6.py:859, in ModelReader.read_model(self, **kwargs)
    857         self.temproot = None
    858     else:
--> 859         model = self._read_model_inner()
    861 except:
    862     if self.model:

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\serialize\serializer_6.py:874, in ModelReader._read_model_inner(self)
    872 def _read_model_inner(self):
--> 874     model = self.parse_dir()
    875     self.instructions.execute_selected_methods([
    876         "doc",
    877         "set_formula",
   (...)
    880         "set_doc"
    881     ])
    882     self.instructions.execute_selected_methods(["add_bases"])

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\serialize\serializer_6.py:902, in ModelReader.parse_dir(self, path_, target, spaces)
    900 for name in spaces:
    901     space = target.new_space(name=name)
--> 902     self.parse_source(path_ / name / "__init__.py", space)
    903     nextdir = path_ / name
    904     self._parse_dynamic_inputs(nextdir, space)

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\serialize\serializer_6.py:951, in ModelReader.parse_source(self, path_, obj)
    947 sec = srcstructure.get_section(stmt.lineno)
    948 parser = ParserSelector.select(stmt, sec, atok)(
    949     stmt, atok, self, sec, obj, srcpath=path_
    950 )
--> 951 ist = parser.get_instruction()
    952 if parser.priority == PriorityID.AT_PARSE:
    953     ist.execute()

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\modelx\serialize\serializer_6.py:1143, in AttrAssignParser.get_instruction(self)
   1140         return
   1142 else:
-> 1143     raise RuntimeError("unknown attribute assignment")

RuntimeError: unknown attribute assignment

test_model_common_after.zip
test_model_common_before.zip

[fumitoh]

I can't reproduce your error with the files you provided. Did you change modelx's code by yourself?
Looking at this relevant part of modelx's source code, it seems impossible for such error to occur

[bakerwy]

Yes? I think something is wrong..I should take a look at that.. Anyway, thanks for clarifying!