Keras load_from_json JsonError

I’m loading a net architecture from a json, here is the json: ` { “backend”:“tensorflow”, “keras_version”:“2.0.3”, “config”:[ { “config”:{ “batch_input_shape”:[ null, 6, 6, 9 ], “kernel_constraint”:null, “name”:“dense_1”, “dtype”:“float32”, “units”:24, “bias_constraint”:null, “kernel_initializer”:{ “config”:{ “scale”:1.0, “distribution”:“uniform”, “mode”:“fan_avg”, “seed”:null }, “class_name”:“VarianceScaling” }, “use_bias”:true, “kernel_regularizer”:null, “bias_regularizer”:null, “activation”:“relu”, “trainable”:true, “bias_initializer”:{ “config”:{

           },
           "class_name":"Zeros"
        },
        "activity_regularizer":null
     },
     "class_name":"Dense"
  },
  {
     "config":{
        "rate":0.25,
        "name":"dropout_1",
        "trainable":true
     },
     "class_name":"Dropout"
  },
  {
     "config":{
        "kernel_constraint":null,
        "name":"dense_2",
        "units":24,
        "bias_constraint":null,
        "kernel_initializer":{
           "config":{
              "scale":1.0,
              "distribution":"uniform",
              "mode":"fan_avg",
              "seed":null
           },
           "class_name":"VarianceScaling"
        },
        "use_bias":true,
        "kernel_regularizer":null,
        "bias_regularizer":null,
        "activation":"relu",
        "trainable":true,
        "bias_initializer":{
           "config":{

           },
           "class_name":"Zeros"
        },
        "activity_regularizer":null
     },
     "class_name":"Dense"
  },
  {
     "config":{
        "rate":0.5,
        "name":"dropout_2",
        "trainable":true
     },
     "class_name":"Dropout"
  },
  {
     "config":{
        "name":"flatten_1",
        "trainable":true
     },
     "class_name":"Flatten"
  },
  {
     "config":{
        "kernel_constraint":null,
        "name":"dense_3",
        "units":1,
        "bias_constraint":null,
        "kernel_initializer":{
           "config":{
              "scale":1.0,
              "distribution":"uniform",
              "mode":"fan_avg",
              "seed":null
           },
           "class_name":"VarianceScaling"
        },
        "use_bias":true,
        "kernel_regularizer":null,
        "bias_regularizer":null,
        "activation":"sigmoid",
        "trainable":true,
        "bias_initializer":{
           "config":{

           },
           "class_name":"Zeros"
        },
        "activity_regularizer":null
     },
     "class_name":"Dense"
  }

], “class_name”:“Sequential” } `

and this is the error: Traceback (most recent call last): File “D:\workspace2\NN\src\ModelLoader.py”, line 19, in <module> model2 = model_from_json(‘ModelNoComp2Dense24Nueuroni.json’) File “C:\Users\emanuele\python3.5\lib\site-packages\keras-2.0.3-py3.5.egg\keras\models.py”, line 332, in model_from_json config = json.loads(json_string.encode().decode()) File “C:\Users\emanuele\python3.5\lib\json_init_.py”, line 319, in loads return _default_decoder.decode(s) File “C:\Users\emanuele\python3.5\lib\json\decoder.py”, line 339, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File “C:\Users\emanuele\python3.5\lib\json\decoder.py”, line 357, in raw_decode raise JSONDecodeError(“Expecting value”, s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

i’m loading the model with:

model2 = model_from_json(‘ModelNoComp2Dense24Nueuroni.json’)

[WVmf]

For anyone who ends up here due to the json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) issue (as I did): The model_from_json() method expects a JSON string as its first parameter, not the name of a JSON file. So the following worked for me:

import json
from keras.models import model_from_json

with open('model_architecture.json', 'r') as json_file:
    model = model_from_json(json_file.read())

[harpalsahota]

I had the same issue and came up with the following workaround:

import json

from keras.models import model_from_json

with open(model_architecture, 'r') as json_file:
    architecture = json.load(json_file)
    model = model_from_json(architecture)