[Python] MIDIUtil crescendo: Python

I would like to have a crescendo (rise in volume) through each note using MIDIUtil. Is there a way to do this? I have the simple MIDIUtil demo code and have modified it so each note lasts 5 beats. I have a basic code like this:

from midiutil.MidiFile import *
degrees = [60, 62, 64, 65, 67, 69, 71, 72]
track = 0
channel = 0
time = 0
duration = 5
tempo = 120
volume = 100
MyMIDI = MIDIFile(1)
MyMIDI.addTempo(track,time, tempo)
for pitch in degrees:
MyMIDI.addNote(track, channel, pitch, time, duration, volume)
time = time + 1
with open("major-scale.mid", "wb") as output_file:
MyMIDI.writeFile(output_file)


Many thanks.

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