Azure eventhub sending several float array messages in python - message-queue

Question

I have three float arrays of data (A,B,C) that I want to send it to event hub.
The issue here is that the classes are nested and I can't figure out how to shape the data to be able to send successfully.
Here is the code that I am trying
logger = logging.getLogger("azure")
ADDRESS = ""
USER = ""
KEY = ""
try:
if not ADDRESS:
raise ValueError("No EventHubs URL supplied.")
# Create Event Hubs client
client = EventHubClient(ADDRESS, debug=False, username=USER, password=KEY)
sender = client.add_sender(partition="0")
client.run()
x_value = np.arange(100)
try:
start_time = time.time()
for i in range(100000):
A = np.asarray([1,2,3,4])
B = np.asarray([2,3,4,5])
C = np.asarray([3,4,5,6])
message = [A, B, C]
sender.send(EventData(body = message))
time.sleep(1)
except:
raise
finally:
end_time = time.time()
client.stop()
run_time = end_time - start_time
logger.info("Runtime: {} seconds".format(run_time))
except KeyboardInterrupt:
pass
In this way, I am seeing the error 'ValueBody' object has no attribute 'append'
I think by types, the class encodes the message differently.
Instead of sending a single message with a serial string, I want to send the message in a parallel way, and receive them something like this:
Receive one eventdata with the form of the list [A,B,C]
Receive three eventdata A, B, C separately, like calling three different objects basis.
For the second way, I am not sure if it would work since I am using only one partition and that may have the three eventdata A, B, C mixed when I receive them and I do not want that.

Answer 1

I have confirmed with ms support, the feedback is that: it only works for a list of string or bytes, but does not work for a list of int.
And also you should note that, even it sends a list of string, when receive the list, it will concatenate the all elements of the list to compose a single message. For example, if there is a list ["a","b","c","d"] for sending, when receive it, it will show this "abcd" as a whole string.
I have tested it by myself, the above information is correct.
So for your case, you should consider change the list to a string or json string. when receiving it, you can format the data to what you need.
Hope it helps.