Duplicate ports on Raspberry PI

[AL1-1956]

Hello everybody
I am sorry if this question has already been asked (and answered)

I am working with mido on a Raspberry PI

I am using Python 3.9.2

When I want to get the names of output ports (or input ports) I get a list with all available ports duplicated like so

pi@raspberrypi:/ $ python3
Python 3.9.2 (default, Mar 12 2021, 04:06:34)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.

import mido
mido.get_input_names()
['Midi Through:Midi Through Port-0 14:0', 'f_midi:f_midi 16:0', 'rtpmidi raspberrypi:Network 128:0', 'Midi Through:Midi Through Port-0 14:0', 'f_midi:f_midi 16:0', 'rtpmidi raspberrypi:Network 128:0']

mido.get_output_names()
['Midi Through:Midi Through Port-0 14:0', 'f_midi:f_midi 16:0', 'rtpmidi raspberrypi:Network 128:0', 'Midi Through:Midi Through Port-0 14:0', 'f_midi:f_midi 16:0', 'rtpmidi raspberrypi:Network 128:0']

and it seems to me (but maybe i am wrong) that the 2 commands give the exact same results for input and output ports

Thank you for reading
Kindly

Alain