Unable to find application properties set by MQTT direct connection with IoTHub

[chewkevin]

I'm attempting to send a message via the python MQTT client, publishing telemetry data to the topic below, with a binary body, and trying to find 'myproperty' in the application properties.:

devices/9999999-99999/messages/events/myproperty=myvalue

I'm not sure where to find the information in the EventHubEvent object. event.iothub_metadata simply contains {}

Related information

function.json

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "dataType": "binary",
      "type": "eventHubTrigger",
      "name": "event",
      "direction": "in",
      "eventHubName": "Main-IoT-Hub",
      "connection": "EVENT_HUB_CONNECTION",
      "cardinality": "one",
      "consumerGroup": "$Default"
    }
  ]
}

python azure function definition

# __init__.py
def main(event):
    # do stuff here

Abbreviated code used to send telemetry data (it's not the exact code, but I've tried to include relevant information in here).

from paho.mqtt import client as mqtt
from pathlib import *

device_client = client_create_azure_mqtt() # creates the mqtt client
device_client.connect(host=azure_iot_hub_name + ".azure-devices.net", port=8883)
device_client.loop_start()

datafile = PosixPath('path/to/mybinaryfilename.dat')
payload = datafile.read_bytes()
result = device_client.publish("devices/9999999-99999/messages/events/myproperty=myvalue", payload)

[Hazhzeng]

We are releasing a fix to restore the IoTHub metadata. It will go with the next release. Azure/azure-functions-python-library#42