pythonif elif

pythonif elif

如题，是在一个案例的for循环中，if执行了，按理elif不应该执行，但是结果依然执行了elif，不太理解，是忽略了什么吗

for msg in track:

print -----------------------------------------------------

print the msg is {} \n.format(msg)

print \n

if isinstance(msg, midi.EndOfTrackEvent):

print end of track!!pass!!

continue

if > 0:

print ## > 0 !!!

current_tick =

print current_tick plus {} tick! .format()

print current_tick

print

if isinstance(msg, ) and msg.get_velocity() != 0:

if len(notes[msg.get_pitch()]) > 0 and len(notes[msg.get_pitch()][-1]) != 2:

if verbose:

print(double oteOn encountered,delete the first)

print the msg double note_on msg is {} \n.format(msg)

print the pitch is {}.format(msg.get_pitch())

else:

notes[msg.get_pitch()] = [[current_tick]]

print notes[msg.get_pitch()]

print [[current_tick]]

print #####this is noteonevent,,,the current_tick plus {} #####\n .format(msg.get_pitch)

# print the cu

elif isinstance(msg, ) or (isinstance(msg, ) and msg.get_velocity() == 0):

if len(notes[msg.get_pitch()][-1]) != 1:

if verbose:

print (warning:skipping noteoff event with no corresponding noteon)

print (msg)

else:

notes[msg.get_pitch()][-1] = [current_tick]

print the current_tick plus {} \n.format(notes[msg.get_pitch()][-1])

print notes[msg.get_pitch()][-1]

print [current_tick]