连接到远程IPython实例

如果要在另一个Python程序的内核中运行代码，最简单的方法是连接BlockingKernelManager。现在最好的例子是Paul
Ivanov的vim-ipython客户端，或IPython自己的终端客户端。

要点：

• ipython内核在中编写JSON连接文件，

  IPYTHONDIR/profile_<name>/security/kernel-<id>.json

  其中包含各种客户端连接和执行代码所需的信息。
• KernelManagers是用于与内核进行通信（执行代码，接收结果等）的对象。*

一个工作示例：

在shell中，执行以下操作

ipython kernel

ipython qtconsole

$> ipython kernel[IPKernelApp] To connect another client to this kernel, use:[IPKernelApp] --existing kernel-6759.json

这写了’kernel-6759.json’文件

然后，您可以运行此Python代码段以连接KernelManager，并运行一些代码：

from IPython.lib.kernel import find_connection_filefrom IPython.zmq.blockingkernelmanager import BlockingKernelManager# this is a helper method for turning a fraction of a connection-file name# into a full path.  If you already know the full path, you can just use thatcf = find_connection_file('6759')km = BlockingKernelManager(connection_file=cf)# load connection info and init communicationkm.load_connection_file()km.start_channels()def run_cell(km, pre):    # now we can run pre.  This is done on the shell channel    shell = km.shell_channel    print    print "running:"    print pre    # execution is immediate and async, returning a UUID    msg_id = shell.execute(pre)    # get_msg can block for a reply    reply = shell.get_msg()    status = reply['content']['status']    if status == 'ok':        print 'succeeded!'    elif status == 'error':        print 'failed!'        for line in reply['content']['traceback']: print linerun_cell(km, 'a=5')run_cell(km, 'b=0')run_cell(km, 'c=a/b')

运行的输出：

running:a=5succeeded!running:b=0succeeded!running:c=a/bfailed!---------------------------------------------------------------------------ZeroDivisionError   Traceback (most recent call last)/Users/minrk/<ipython-input-11-fb3f79bd285b> in <module>()----> 1 c=a/bZeroDivisionError: integer division or modulo by zero

有关如何解释回复的更多信息，请参见消息规范。如果相关，则stdout /
err和display数据将过来

km.iopub_channel

shell.execute()

PS：对于这些新功能的文档质量，我深表歉意。我们有很多工作要做。