我想在我正在开发的一个PyQt应用程序中嵌入一个IPython qt控制台部件。下面提供的代码（改编自
https://stackoverflow.com/a/9796491/1332492
)在IPython v0.12中完成了这个任务。然而，在IPython v0.13中，在
self.heartbeat.start()
与
RuntimeError: threads can only be started once
这一行崩溃了。注释掉这一行就会出现小工具，但对用户的输入没有反应。
有没有人知道如何实现IPython v0.13的同等功能？
Adapted from https://stackoverflow.com/a/9796491/1332492 import os import atexit from IPython.zmq.ipkernel import IPKernelApp from IPython.lib.kernel import find_connection_file from IPython.frontend.qt.kernelmanager import QtKernelManager from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget from IPython.config.application import catch_config_error from PyQt4 import QtCore class IPythonLocalKernelApp(IPKernelApp): DEFAULT_INSTANCE_ARGS = [''] @catch_config_error def initialize(self, argv=None): super(IPythonLocalKernelApp, self).initialize(argv) self.kernel.eventloop = self.loop_qt4_nonblocking def loop_qt4_nonblocking(self, kernel): """Non-blocking version of the ipython qt4 kernel loop""" kernel.timer = QtCore.QTimer() kernel.timer.timeout.connect(kernel.do_one_iteration) kernel.timer.start(1000*kernel._poll_interval) def start(self, argv=DEFAULT_INSTANCE_ARGS): """Starts IPython kernel app argv: arguments passed to kernel self.initialize(argv) self.heartbeat.start() if self.poller is not None: self.poller.start() self.kernel.start() class IPythonConsoleQtWidget(RichIPythonWidget): _connection_file = None def __init__(self, *args, **kw): RichIPythonWidget.__init__(self, *args, **kw) self._existing = True self._may_close = False self._confirm_exit = False def _init_kernel_manager(self): km = QtKernelManager(connection_file=self._connection_file, config=self.config) km.load_connection_file() km.start_channels(hb=self._heartbeat) self.kernel_manager = km atexit.register(self.kernel_manager.cleanup_connection_file) def connect_kernel(self, connection_file, heartbeat=False): self._heartbeat = heartbeat if os.path.exists(connection_file): self._connection_file = connection_file else: self._connection_file = find_connection_file(connection_file) self._init_kernel_manager() def main(**kwargs): kernelapp = IPythonLocalKernelApp.instance() kernelapp.start() widget = IPythonConsoleQtWidget() widget.connect_kernel(connection_file=kernelapp.connection_file) widget.show() return widget if __name__ == "__main__": from PyQt4.QtGui import QApplication app = QApplication(['']) main() app.exec_()0.13版的回溯
RuntimeError Traceback (most recent call last)
/Users/beaumont/terminal.py in <module>()
80 from PyQt4.QtGui import QApplication
81 app = QApplication([''])
---> 82 main()
global main = <function main at 0x106d0c848>
83 app.exec_()
/Users/beaumont/terminal.py in main(**kwargs={})
69 def main(**kwargs):
70 kernelapp = IPythonLocalKernelApp.instance()
---> 71 kernelapp.start()
kernelapp.start = <bound method IPythonLocalKernelApp.start of <__main__.IPythonLocalKernelApp object at 0x106d10590>>
73 widget = IPythonConsoleQtWidget()
/Users/beaumont/terminal.py in start(self=<__main__.IPythonLocalKernelApp object>, argv=[''])
33 """
34 self.initialize(argv)
---> 35 self.heartbeat.start()
self.heartbeat.start = <bound method Heartbeat.start of <Heartbeat(Thread-1, started daemon 4458577920)>>
37 if self.poller is not None:
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.pyc in start(self=<Heartbeat(Thread-1, started daemon 4458577920)>)
487 raise RuntimeError("thread.__init__() not called")
488 if self.__started.is_set():
--> 489 raise RuntimeError("threads can only be started once")
global RuntimeError = undefined
490 if __debug__:
491 self._note("%s.start(): starting thread", self)
RuntimeError: threads can only be started once
