In which file did you encounter the issue?

python-docs-samples/iot/api-client/end_to_end_example/cloudiot_pubsub_example_mqtt_device.py
python-docs-samples/iot/api-client/end_to_end_example/cloudiot_pubsub_example_server.py

Did you change the file? If so, how?

Diff

Describe the issue

Data from MQTT bridge must be decoded in Python3 to become a string that can be parsed to JSON by this code. Adding explicit decode calls solves the issue.