simple_send to a different port

[alexroat]

I'm trying to connect to an ActiveMQ broker which is running on the port 5673 instead of the standard 5671(because on 5671 we are running AMQP 0.91 with another broker).
I used the example:

import os
try:
    from urlparse import urlparse
except ImportError:
    from urllib.parse import urlparse

import uamqp
from uamqp import authentication

uri = "amqp://111.222.333.444:5673/examples/"
key_name = "user"
access_key = ******

def uamqp_send_simple():
    msg_content = b"Hello world"

    parsed_uri = urlparse(uri)
    plain_auth = authentication.SASLPlain(parsed_uri.hostname, key_name, access_key)

    uamqp.send_message(uri, msg_content, auth=plain_auth)
    print("Message sent!")

if __name__ == "__main__":
    uamqp_send_simple()

Anyway, it appears to be not working:

Traceback (most recent call last):
  File "test.py", line 30, in <module>
    uamqp_send_simple()
  File "test.py", line 26, in uamqp_send_simple
    uamqp.send_message(uri, msg_content, auth=plain_auth)
  File "/usr/local/lib/python2.7/dist-packages/uamqp/__init__.py", line 68, in send_message
    return send_client.send_all_messages()
  File "/usr/local/lib/python2.7/dist-packages/uamqp/client.py", line 775, in send_all_messages
    running = self.wait()
  File "/usr/local/lib/python2.7/dist-packages/uamqp/client.py", line 757, in wait
    running = self.do_work()
  File "/usr/local/lib/python2.7/dist-packages/uamqp/client.py", line 401, in do_work
    if not self.client_ready():
  File "/usr/local/lib/python2.7/dist-packages/uamqp/client.py", line 385, in client_ready
    if not self._client_ready():
  File "/usr/local/lib/python2.7/dist-packages/uamqp/client.py", line 531, in _client_ready
    self.message_handler.open()
  File "/usr/local/lib/python2.7/dist-packages/uamqp/sender.py", line 208, in open
    "Failed to open Message Sender. "
uamqp.errors.AMQPConnectionError: Failed to open Message Sender. Please confirm credentials and target URI.

Using wireshark I see that the TCP traffic is still going to 5671, so i suppose the port parameter is ignored at all.

Could you kindly post a working example on how to use uamqp on different TCP port.
The provided examples also they use environment variables, could be helpful to have a sample value of these environmental variables, i suppose is a standard form "amqps://host:port/channel".

Thanks