def send_multipart(self, msg_parts, flags=0, copy=True, track=False):
"""send a sequence of buffers as a multipart message
The zmq.SNDMORE flag is added to all msg parts before the last.
Parameters
----------
msg_parts : iterable
A sequence of objects to send as a multipart message. Each element
can be any sendable object (Frame, bytes, buffer-providers)
flags : int, optional
SNDMORE is handled automatically for frames before the last.
copy : bool, optional
Should the frame(s) be sent in a copying or non-copying manner.
track : bool, optional
Should the frame(s) be tracked for notification that ZMQ has
finished with it (ignored if copy=True).
Returns
-------
None : if copy or not track
MessageTracker : if track and not copy
a MessageTracker object, whose `pending` property will
be True until the last send is completed.
"""
for msg in msg_parts[:-1]:
self.send(msg, SNDMORE|flags, copy=copy, track=track)
# Send the last part without the extra SNDMORE flag.
return self.send(msg_parts[-1], flags, copy=copy, track=track)
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