import rtmidi2
print(rtmidi2.get_in_ports())
print(rtmidi2.get_out_ports())

import rtmidi2
midi_out = rtmidi2.MidiOut()
# open the first available port
midi_out.open_port(0)
# send C3 with vel. 100 on channel 1
midi_out.send_noteon(0, 48, 100)

import time
midi_in = rtmidi.MidiIn()
midi_in.open_port(0)
while True:
    message = midi_in.get_message()
    if message:
        print(message, delta_time)
    else:
        time.sleep(0.01)

def callback(message, time_stamp):
    print(message, time_stamp)
midi_in = rtmidi2.MidiIn()
midi_in.callback = callback
midi_in.open_port(0)

# get messages from all available ports
midi_in = MidiInMulti()
midi_in.open_ports("*")
def callback(msg, timestamp):
    msgtype, channel = splitchannel(msg[0])
    print(msgtype2str(msgtype), msg[1], msg[2])
midi_in.callback = callback

def callback(src, msg, timestamp):
    # src will hold the name of the device
    print("got message from", src)

# send a cluster of ALL notes with a duration of 1 second
midi_out = MidiOut()
midi_out.open_port()
notes = range(127)
velocities = [90] * len(notes)
midi_out.send_noteon_many(0, notes, velocities)
time.sleep(1)
midi_out.send_noteon_many(0, notes, [0] * len(notes))