Python 3 support for pymavlink

I have some image processing code that will only run in Python 3 that I need to use with our vehicle. We have written some RC controller code that works fine in Python 2.7, but not in Python 3.

I am using pymavlink and specifically mavuitl.rc_channels_override_send() to control the motors. Running the code in Python 2 moves the motors as expected, but using the exact same code in Python 3 I get no response from the motors and no error messages in the terminal. I have a virtual environment setup, and there do not appear to be any errors during installation of pymavlink or other dependencies. pip freeze shows the following after installation for both Python 2 and 3:


Any help is much appreciated! Thanks!