从iPython内核捕获语法错误

通过进程内ipython内核连接、运行、显示和显示错误的方法是

import re, sys, time, os
from StringIO import StringIO
from IPython.kernel.inprocess.blocking import BlockingInProcessKernelClient
from IPython.kernel.inprocess.manager import InProcessKernelManager
from IPython.kernel.inprocess.ipkernel import InProcessKernel
from IPython.core.interactiveshell import InteractiveShell
from IPython.utils.io import capture_output

def decorated_run_code(fn):
    def new_run_code(*args, **kwargs):
        res = fn(*args, **kwargs)
        setattr(args[0], "last_known_outflag", res)
        return res
    return new_run_code
InteractiveShell.run_code = decorated_run_code(InteractiveShell.run_code)    

km = InProcessKernelManager()
km.start_kernel()
kc = BlockingInProcessKernelClient(kernel=km.kernel)
kc.start_channels()
kc.shell_channel.execute('%pylab inline')
kernel = InProcessKernel()    
ip = kernel.shell.get_ipython()

with capture_output() as io:
    ip.run_cell(fail)
print "res", io.stdout
etype, value, tb = kernel.shell._get_exc_info(None)
print kernel.shell.last_known_outflag
if kernel.shell.last_known_outflag: print (etype, "/", value, "/", tb)

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我不得不修改run_代码以捕获其结果并将其设置为self，因为_get_exc_info会在另一个错误发生之前返回相同的错误，因此没有其他方法可以查看是否发生了错误。如果有人有更好的方法，我想听听。

在iptyhon 3.0中，错误条件更容易捕捉，请参阅