Error while exporting trainined model in Custom Vision API

Question

I am using Custom vision python API for training a model. Everything runs fine when I train for the first time but while training the model again for the same project I get an error

"requests.exceptions.MissingSchema: Invalid URL 'None': No schema supplied. Perhaps you meant http://None?"

I publish the iteration after training and also check if I am exporting the same using print statement. both are same.
Can you please help me solve this error?

Training status: Training
Training status: Completed
Publishing this project: AAAAAAAAAAAA
Iteration: BBBBBBBBBBBBBBB classifyModel
Done Training!
This project is being exported : AAAAAAAAAAAA
This project iteration is being exported : BBBBBBBBBBBBBBBBB
Done reading pipeline!
The model ABC has a precision value of: 0.0
The model ABC has a recall value of: 0.0
The model ABC has an average precision value of: 0.8333334
Something: {'additional_properties': {}, 'platform': 'TensorFlow', 'status': 'Exporting', 'download_uri': None, 'flavor': None,

'newer_version_available': False}

Second something: [<azure.cognitiveservices.vision.customvision.training.models._models_py3.Export object at LLLLLLLLLLLLLLLLLLL>]
Internal Server Error: /project/23/build_training/train/

Answer 1

Hello,

This issue seem you are passing wrong URL to the function. Please refer to below code sample:

https://learn.microsoft.com/en-us/azure/cognitive-services/custom-vision-service/quickstarts/image-classification?tabs=visual-studio&pivots=programming-language-python

Especially the variables for your resource's Azure endpoint and subscription keys part:

# Replace with valid values  
ENDPOINT = "PASTE_YOUR_CUSTOM_VISION_TRAINING_ENDPOINT_HERE"  
training_key = "PASTE_YOUR_CUSTOM_VISION_TRAINING_SUBSCRIPTION_KEY_HERE"  
prediction_key = "PASTE_YOUR_CUSTOM_VISION_PREDICTION_SUBSCRIPTION_KEY_HERE"  
prediction_resource_id = "PASTE_YOUR_CUSTOM_VISION_PREDICTION_RESOURCE_ID_HERE"  

If you still can not find out the issue, please share the code your are using if that is not confidential.

Regards,
Yutong