Calling predict with the predictor we got back from deploy

[Firas-Ben-Hassan]

Hello Sagemaker Community,

I get this error when I try to run this command in Sagemaker Notebook : "print(predictor.predict("the password is 15jdgvd "))"

The error :

ValueError Traceback (most recent call last)
in ()
8
9
---> 10 print(predictor.predict("the password is 15jdgvd "))

~/anaconda3/envs/python3/lib/python3.6/site-packages/sagemaker/predictor.py in predict(self, data)
72 """
73 if self.serializer is not None:
---> 74 data = self.serializer(data)
75
76 request_args = {

~/anaconda3/envs/python3/lib/python3.6/site-packages/sagemaker/predictor.py in call(self, data)
247 return _json_serialize_from_buffer(data)
248
--> 249 raise ValueError("Unable to handle input format: {}".format(type(data)))
250
251

ValueError: Unable to handle input format: <class 'str'>

[yangaws]

Hi,

From the error message, the json serializer in predictor.py is invoked. So if that's the correct serializer you want to use, then you cannot serialize the data from a string as the error message indicated. What you can serialize with this json serializer is: numpy array, list, dict, file and buffer.

I cannot see what you are trying to do just by this code. If you provide us more info(what estimator, model, etc), we may have suggestions on data type you should use.

Thanks

[yangaws]

Thanks for your info @PFE-Passau

Now we have better ideas of the problem here. We should support string serialization in built in json serializer. We have already put this in backlog and I will mark this issue as a feature request.

For a short-term solution to your problem, I recommend you to implement a simple serializer for now. And you can also contribute it to us. Our json serializer codes are here:

https://github.com/aws/sagemaker-python-sdk/blob/master/src/sagemaker/predictor.py#L221

Thanks

[Firas-Ben-Hassan]

Thanks @yangaws,

Done!

[mohanasudhan]

@Firas-Ben-Hassan predictor.predict has evolved over the years and we currently support StringSerializer class StringSerializer(SimpleBaseSerializer):.

Additionally, we have released a new class to simplify the deployment with automated wiring of serializer with release of ModelBuilder (https://docs.aws.amazon.com/sagemaker/latest/dg/how-it-works-modelbuilder-creation.html)

Happy to help if it is still an issue.

[mohanasudhan]

We are closing this issue as we currently lack sufficient information to proceed. Please feel free to reopen the issue if you can provide more details.