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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
comm	[ DIR ]	drwxr-xr-x
gui	[ DIR ]	drwxr-xr-x
inprocess	[ DIR ]	drwxr-xr-x
pylab	[ DIR ]	drwxr-xr-x
resources	[ DIR ]	drwxr-xr-x
tests	[ DIR ]	drwxr-xr-x
__init__.py	125 B	-rw-r--r--
__main__.py	100 B	-rw-r--r--
_eventloop_macos.py	3.95 KB	-rw-r--r--
_version.py	176 B	-rw-r--r--
codeutil.py	1.27 KB	-rw-r--r--
connect.py	6.1 KB	-rw-r--r--
datapub.py	1.89 KB	-rw-r--r--
displayhook.py	2.62 KB	-rw-r--r--
embed.py	2.01 KB	-rw-r--r--
eventloops.py	10.62 KB	-rw-r--r--
heartbeat.py	2.35 KB	-rw-r--r--
iostream.py	14.83 KB	-rw-r--r--
ipkernel.py	14.99 KB	-rw-r--r--
jsonutil.py	6.37 KB	-rw-r--r--
kernelapp.py	19.96 KB	-rw-r--r--
kernelbase.py	27.18 KB	-rw-r--r--
kernelspec.py	6.47 KB	-rw-r--r--
log.py	766 B	-rw-r--r--
parentpoller.py	4.08 KB	-rw-r--r--
pickleutil.py	12.66 KB	-rw-r--r--
serialize.py	5.99 KB	-rw-r--r--
zmqshell.py	21.2 KB	-rw-r--r--

Code Editor : heartbeat.py

"""The client and server for a basic ping-pong style heartbeat.
"""

#-----------------------------------------------------------------------------
#  Copyright (C) 2008-2011  The IPython Development Team
#
#  Distributed under the terms of the BSD License.  The full license is in
#  the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------

import errno
import os
import socket
from threading import Thread

import zmq

from jupyter_client.localinterfaces import localhost

#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------

class Heartbeat(Thread):
    "A simple ping-pong style heartbeat that runs in a thread."

def __init__(self, context, addr=None):
        if addr is None:
            addr = ('tcp', localhost(), 0)
        Thread.__init__(self)
        self.context = context
        self.transport, self.ip, self.port = addr
        if self.port == 0:
            if addr[0] == 'tcp':
                s = socket.socket()
                # '*' means all interfaces to 0MQ, which is '' to socket.socket
                s.bind(('' if self.ip == '*' else self.ip, 0))
                self.port = s.getsockname()[1]
                s.close()
            elif addr[0] == 'ipc':
                self.port = 1
                while os.path.exists("%s-%s" % (self.ip, self.port)):
                    self.port = self.port + 1
            else:
                raise ValueError("Unrecognized zmq transport: %s" % addr[0])
        self.addr = (self.ip, self.port)
        self.daemon = True

def run(self):
        self.socket = self.context.socket(zmq.ROUTER)
        self.socket.linger = 1000
        c = ':' if self.transport == 'tcp' else '-'
        self.socket.bind('%s://%s' % (self.transport, self.ip) + c + str(self.port))
        while True:
            try:
                zmq.device(zmq.QUEUE, self.socket, self.socket)
            except zmq.ZMQError as e:
                if e.errno == errno.EINTR:
                    continue
                else:
                    raise
            else:
                break

${this.title}

Code Editor : heartbeat.py