[IPython-dev] ipython1 remote exceptions causing local crashes

Douglas Jones dfj225@gmail....
Wed Feb 21 08:44:22 CST 2007


Ah, it is good to hear that this is not a feature!

Sorry that my original message wasn't clear as to what was actually happening.

I've attached the crash report generated by IPython. In addition, I've
copied from my terminal some information that was printed out after
the "Mail this crash" message and doesn't seem to be in the auto
generated report.

First, some basic info about my machine:
Gentoo Linux 2.6.18 SMP
Python version: 2.4.3
Twisted version: 2.5.0 (I updated from 2.4.0 since my original
message, but the crash persists)
IPython version: 0.7.4.svn.r2010 (Crash was the same with earlier versions)
IPython1 "saw" branch: svn revision 2104

You can see the full list of commands that I've executed in the crash
report attached, but the basic overview is as follows:

rc.executeAll('a') # causes name exception, but does not crash the client
%autopx
a                      # same exception is generated here, but IPython
client crashes

If you need more information than what I've provided here, please let
me know and I will try to get whatever is needed.

Thanks,
~Doug


Here is what I've copied from the terminal after the IPython "mail
this crash" message.

Disconnecting from  ('localhost', 10111)
Unhandled error in Deferred:
(debug:  C: Deferred was created:
 C:  File "/usr/bin/ipython", line 27, in ?
 C:    IPython.Shell.start().mainloop()
 C:  File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line
59, in mainloop
 C:    self.IP.mainloop(banner)
 C:  File "/usr/lib64/python2.4/site-packages/IPython/iplib.py", line
1500, in mainloop
 C:    self.interact(banner)
 C:  File "/usr/lib64/python2.4/site-packages/IPython/iplib.py", line
1647, in interact
 C:    more = self.push(line)
 C:  File "/usr/lib64/python2.4/site-packages/IPython/iplib.py", line
1948, in push
 C:    more = self.runsource('\n'.join(self.buffer), self.filename)
 C:  File "/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/magic.py",
line 139, in pxrunsource
 C:    self.activeController.iexecuteAll(source)
 C:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py",
line 294, in iexecuteAll
 C:    return self.iexecute('all', lines)
 C:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py",
line 286, in iexecute
 C:    d = self.execute(targets, lines, block=False)
 C:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py",
line 114, in execute
 C:    return self.multiengine.execute(targets, lines, block)
 C:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multienginepb.py",
line 417, in execute
 C:    d2 = self._getActualDeferred(d)
 C:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multienginepb.py",
line 398, in _getActualDeferred
 C:    d2 = self._getPendingDeferred(deferredID)
 C:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multienginepb.py",
line 392, in _getPendingDeferred
 C:    d = self.callRemote('getPendingDeferred', deferredID)
 C:  File "/usr/lib64/python2.4/site-packages/twisted/spread/pb.py",
line 343, in callRemote
 C:    _name, args, kw)
 C:  File "/usr/lib64/python2.4/site-packages/twisted/spread/pb.py",
line 822, in _sendMessage
 C:    rval = defer.Deferred()
 I: First Invoker was:
 I:  File "/usr/bin/ipython", line 27, in ?
 I:    IPython.Shell.start().mainloop()
 I:  File "/usr/lib64/python2.4/site-packages/IPython/Shell.py", line
59, in mainloop
 I:    self.IP.mainloop(banner)
 I:  File "/usr/lib64/python2.4/site-packages/IPython/iplib.py", line
1500, in mainloop
 I:    self.interact(banner)
 I:  File "/usr/lib64/python2.4/site-packages/IPython/iplib.py", line
1647, in interact
 I:    more = self.push(line)
 I:  File "/usr/lib64/python2.4/site-packages/IPython/iplib.py", line
1948, in push
 I:    more = self.runsource('\n'.join(self.buffer), self.filename)
 I:  File "/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/magic.py",
line 139, in pxrunsource
 I:    self.activeController.iexecuteAll(source)
 I:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py",
line 294, in iexecuteAll
 I:    return self.iexecute('all', lines)
 I:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py",
line 289, in iexecute
 I:    return self.blockOn(d)
 I:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py",
line 87, in blockOn
 I:    return blockOn(d)
 I:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/blockon.py",
line 156, in blockOn
 I:    return bd.blockOn()
 I:  File "/home/djones/local/ipython_saw//lib64/python2.4/site-packages/ipython1/kernel/blockon.py",
line 94, in blockOn
 I:    reactor.iterate(TIMEOUT)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/internet/base.py",
line 382, in iterate
 I:    self.doIteration(delay)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/internet/selectreactor.py",
line 133, in doSelect
 I:    _logrun(selectable, _drdw, selectable, method, dict)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/python/log.py",
line 48, in callWithLogger
 I:    return callWithContext({"system": lp}, func, *args, **kw)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/python/log.py",
line 33, in callWithContext
 I:    return context.call({ILogContext: newCtx}, func, *args, **kw)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/python/context.py",
line 59, in callWithContext
 I:    return self.currentContext().callWithContext(ctx, func, *args, **kw)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/python/context.py",
line 37, in callWithContext
 I:    return func(*args,**kw)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/internet/selectreactor.py",
line 139, in _doReadOrWrite
 I:    why = getattr(selectable, method)()
 I:  File "/usr/lib64/python2.4/site-packages/twisted/internet/tcp.py",
line 362, in doRead
 I:    return self.protocol.dataReceived(data)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/spread/banana.py",
line 218, in dataReceived
 I:    gotItem(item)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/spread/banana.py",
line 148, in gotItem
 I:    self.callExpressionReceived(item)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/spread/banana.py",
line 113, in callExpressionReceived
 I:    self.expressionReceived(obj)
 I:  File "/usr/lib64/python2.4/site-packages/twisted/spread/pb.py",
line 522, in expressionReceived
 I:    method(*sexp[1:])
 I:  File "/usr/lib64/python2.4/site-packages/twisted/spread/pb.py",
line 891, in proto_answer
 I:    d.callback(self.unserialize(netResult))
)
Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/twisted/spread/pb.py", line
847, in _recvMessage
    netResult = object.remoteMessageReceived(self, message, netArgs, netKw)
  File "/usr/lib64/python2.4/site-packages/twisted/spread/flavors.py",
line 119, in remoteMessageReceived
    state = method(*args, **kw)
  File "/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/enginepb.py",
line 288, in remote_execute
    d = self.service.execute(lines)
  File "/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/engineservice.py",
line 227, in execute
    d = defer.execute(self.shell.execute, lines)
--- <exception caught here> ---
  File "/usr/lib64/python2.4/site-packages/twisted/internet/defer.py",
line 79, in execute
    result = callable(*args, **kw)
  File "/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/core/shell.py",
line 209, in execute
    raise self._tracebackTuple
exceptions.NameError:



On 2/20/07, Fernando Perez <fperez.net@gmail.com> wrote:
> Hi,
>
> On 2/20/07, Douglas Jones <dfj225@gmail.com> wrote:
>
> > Please forgive me if some of the issues I bring up have already been
> > discussed or have already been addressed in the code, as I haven't
> > been able to look through all of the new features and changes.
> >
> > For the project that I am working on, it seems that one of the big
> > features is to use your cluster in an interactive manner. The "feel"
> > of this for our current implementation is much like typing any other
> > command into your python shell. Ipython1 goes a long way to providing
> > the features to make this necessary.
> >
> > That said, it seems like an overreaction to have the user, more or
> > less, ejected from their interactive session for what may have been a
> > trivial mistake. I think one of the nice features of working
> > interactively is that you are given a chance to fix the mistake and
> > continue along with minimal fuss.
>
> [...]
>
> Ah! What you are mentionig is most definitely a bug, though.  Our
> current expectation is that when you get a remote exception, you
> should see an /exception/ in the local interactive shell, with a nice
> traceback and all that.  But if you're actually getting dumped /out/
> of ipython with a 'mail this crash report' message, that is a bug,
> plain and simple.
>
> Please do send us that crash report and whatever other details you
> feel are relevant, and we'll try to hunt this one down ASAP.
>
> Our intent is that the remote-enabled usage should feel very close to
> the 'regular' ipython, so crashing out is definitely not a feature :)
>
> Sorry that I misunderstood your original message.
>
> Cheers,
>
> f
>
-------------- next part --------------
***************************************************************************

IPython post-mortem report

IPython version: 0.7.4.svn.r2010 

SVN revision   : 2010M 

Platform info  : os.name -> posix, sys.platform -> linux2

***************************************************************************

Current user configuration structure:

{'Version': 0,
 '__allownew': False,
 'alias': [],
 'args': [],
 'autocall': 1,
 'autoedit_syntax': 0,
 'autoindent': 1,
 'automagic': 1,
 'banner': 1,
 'c': '',
 'cache_size': 1000,
 'classic': 0,
 'color_info': 1,
 'colors': 'Linux',
 'confirm_exit': 1,
 'debug': 0,
 'deep_reload': 0,
 'editor': '/usr/bin/vim',
 'embedded': False,
 'execfile': [],
 'execute': [''],
 'gthread': 0,
 'help': 0,
 'ignore': 0,
 'import_all': [],
 'import_mod': [],
 'import_some': [[]],
 'include': [],
 'ipythondir': '/home/djones/.ipython',
 'log': 0,
 'logfile': '',
 'logplay': '',
 'magic_docstrings': 0,
 'messages': 1,
 'multi_line_specials': 1,
 'nosep': 0,
 'object_info_string_level': 0,
 'opts': Struct({'__allownew': True}),
 'pdb': 0,
 'pprint': 1,
 'profile': '',
 'prompt_in1': 'In [\\#]: ',
 'prompt_in2': '   .\\D.: ',
 'prompt_out': 'Out[\\#]: ',
 'prompts_pad_left': 1,
 'pylab': 0,
 'q4thread': 0,
 'qthread': 0,
 'quick': 0,
 'quiet': 0,
 'rcfile': 'ipythonrc',
 'readline': 1,
 'readline_merge_completions': 1,
 'readline_omit__names': 0,
 'readline_parse_and_bind': ['tab: complete',
                             '"\\C-l": possible-completions',
                             'set show-all-if-ambiguous on',
                             '"\\C-o": tab-insert',
                             '"\\M-i": "    "',
                             '"\\M-o": "\\d\\d\\d\\d"',
                             '"\\M-I": "\\d\\d\\d\\d"',
                             '"\\C-r": reverse-search-history',
                             '"\\C-s": forward-search-history',
                             '"\\C-p": history-search-backward',
                             '"\\C-n": history-search-forward',
                             '"\\e[A": history-search-backward',
                             '"\\e[B": history-search-forward',
                             '"\\C-k": kill-line',
                             '"\\C-u": unix-line-discard'],
 'readline_remove_delims': '-/~',
 'screen_length': -2,
 'separate_in': '\n',
 'separate_out': '',
 'separate_out2': '',
 'system_header': 'IPython system call: ',
 'system_verbose': 0,
 'term_title': 1,
 'tk': 0,
 'upgrade': 0,
 'wildcards_case_sensitive': 1,
 'wthread': 0,
 'wxversion': '0',
 'xmode': 'Context'}

***************************************************************************

Crash traceback:

---------------------------------------------------------------------------
exceptions.NameError                                     Python 2.4.3: /usr/bin/python
                                                   Wed Feb 21 09:26:41 2007
A problem occured executing Python code.  Here is the sequence of function
calls leading up to the error, with the most recent (innermost) call last.

/usr/bin/ipython 
     12 IPython.Shell.IPShell().mainloop(sys_exit=1)
     13 
     14 [or simply IPython.Shell.IPShell().mainloop(1) ]
     15 
     16 and IPython will be your working environment when you start python. The final
     17 sys.exit() call will make python exit transparently when IPython finishes, so
     18 you don't have an extra prompt to get out of.
     19 
     20 This is probably useful to developers who manage multiple Python versions and
     21 don't want to have correspondingly multiple IPython versions. Note that in
     22 this mode, there is no way to pass IPython any command-line options, as those
     23 are trapped first by Python itself.
     24 """
     25 
     26 import IPython
---> 27 IPython.Shell.start().mainloop()
        IPython.Shell.start.mainloop = undefined
     28 
     29 
     30 
     31 
     32 
     33 
     34 
     35 
     36 
     37 
     38 
     39 
     40 
     41 
     42 

/usr/lib64/python2.4/site-packages/IPython/Shell.py in mainloop(self=<IPython.Shell.IPShell instance>, sys_exit=0, banner=None)
     44 #-----------------------------------------------------------------------------
     45 # This class is trivial now, but I want to have it in to publish a clean
     46 # interface. Later when the internals are reorganized, code that uses this
     47 # shouldn't have to change.
     48 
     49 class IPShell:
     50     """Create an IPython instance."""
     51     
     52     def __init__(self,argv=None,user_ns=None,user_global_ns=None,
     53                  debug=1,shell_class=InteractiveShell):
     54         self.IP = make_IPython(argv,user_ns=user_ns,
     55                                user_global_ns=user_global_ns,
     56                                debug=debug,shell_class=shell_class)
     57 
     58     def mainloop(self,sys_exit=0,banner=None):
---> 59         self.IP.mainloop(banner)
        self.IP.mainloop = <bound method InteractiveShell.mainloop of <IPython.iplib.InteractiveShell object at 0x2b0675e2f210>>
        banner = None
     60         if sys_exit:
     61             sys.exit()
     62 
     63 #-----------------------------------------------------------------------------
     64 class IPShellEmbed:
     65     """Allow embedding an IPython shell into a running program.
     66 
     67     Instances of this class are callable, with the __call__ method being an
     68     alias to the embed() method of an InteractiveShell instance.
     69 
     70     Usage (see also the example-embed.py file for a running example):
     71 
     72     ipshell = IPShellEmbed([argv,banner,exit_msg,rc_override])
     73 
     74     - argv: list containing valid command-line options for IPython, as they

/usr/lib64/python2.4/site-packages/IPython/iplib.py in mainloop(self=<IPython.iplib.InteractiveShell object>, banner='Python 2.4.3 (#1, Oct 25 2006, 17:53:09) \nType "...ut \'object\'. ?object also works, ?? prints more.\n')
   1485 
   1486         If an optional banner argument is given, it will override the
   1487         internally created default banner."""
   1488 
   1489         if self.rc.c:  # Emulate Python's -c option
   1490             self.exec_init_cmd()
   1491         if banner is None:
   1492             if not self.rc.banner:
   1493                 banner = ''
   1494             # banner is string? Use it directly!
   1495             elif isinstance(self.rc.banner,basestring):
   1496                 banner = self.rc.banner
   1497             else:                
   1498                 banner = self.BANNER+self.banner2
   1499 
-> 1500         self.interact(banner)
        self.interact = <bound method InteractiveShell.interact of <IPython.iplib.InteractiveShell object at 0x2b0675e2f210>>
        banner = 'Python 2.4.3 (#1, Oct 25 2006, 17:53:09) \nType "copyright", "credits" or "license" for more information.\n\nIPython 0.7.4.svn.r2010 -- An enhanced Interactive Python.\n?       -> Introduction to IPython\'s features.\n%magic  -> Information about IPython\'s \'magic\' % functions.\nhelp    -> Python\'s own help system.\nobject? -> Details about \'object\'. ?object also works, ?? prints more.\n'
   1501 
   1502     def exec_init_cmd(self):
   1503         """Execute a command given at the command line.
   1504 
   1505         This emulates Python's -c option."""
   1506 
   1507         #sys.argv = ['-c']
   1508         self.push(self.rc.c)
   1509 
   1510     def embed_mainloop(self,header='',local_ns=None,global_ns=None,stack_depth=0):
   1511         """Embeds IPython into a running python program.
   1512 
   1513         Input:
   1514 
   1515           - header: An optional header message can be specified.

/usr/lib64/python2.4/site-packages/IPython/iplib.py in interact(self=<IPython.iplib.InteractiveShell object>, banner='Python 2.4.3 (#1, Oct 25 2006, 17:53:09) \nType "...ut \'object\'. ?object also works, ?? prints more.\n')
   1632             except EOFError:
   1633                 if self.autoindent:
   1634                     self.readline_startup_hook(None)
   1635                 self.write('\n')
   1636                 self.exit()
   1637             except bdb.BdbQuit:
   1638                 warn('The Python debugger has exited with a BdbQuit exception.\n'
   1639                      'Because of how pdb handles the stack, it is impossible\n'
   1640                      'for IPython to properly format this particular exception.\n'
   1641                      'IPython will resume normal operation.')
   1642             except:
   1643                 # exceptions here are VERY RARE, but they can be triggered
   1644                 # asynchronously by signal handlers, for example.
   1645                 self.showtraceback()
   1646             else:
-> 1647                 more = self.push(line)
        more = False
        self.push = <bound method InteractiveShell.push of <IPython.iplib.InteractiveShell object at 0x2b0675e2f210>>
        line = 'a'
   1648                 if (self.SyntaxTB.last_syntax_error and
   1649                     self.rc.autoedit_syntax):
   1650                     self.edit_syntax_error()
   1651             
   1652         # We are off again...
   1653         __builtin__.__dict__['__IPYTHON__active'] -= 1
   1654 
   1655     def excepthook(self, etype, value, tb):
   1656       """One more defense for GUI apps that call sys.excepthook.
   1657 
   1658       GUI frameworks like wxPython trap exceptions and call
   1659       sys.excepthook themselves.  I guess this is a feature that
   1660       enables them to keep running after exceptions that would
   1661       otherwise kill their mainloop. This is a bother for IPython
   1662       which excepts to catch all of the program exceptions with a try:

/usr/lib64/python2.4/site-packages/IPython/iplib.py in push(self=<IPython.iplib.InteractiveShell object>, line='a')
   1933         is reset; otherwise, the command is incomplete, and the buffer
   1934         is left as it was after the line was appended.  The return
   1935         value is 1 if more input is required, 0 if the line was dealt
   1936         with in some way (this is the same as runsource()).
   1937         """
   1938 
   1939         # autoindent management should be done here, and not in the
   1940         # interactive loop, since that one is only seen by keyboard input.  We
   1941         # need this done correctly even for code run via runlines (which uses
   1942         # push).
   1943 
   1944         #print 'push line: <%s>' % line  # dbg
   1945         for subline in line.splitlines():
   1946             self.autoindent_update(subline)
   1947         self.buffer.append(line)
-> 1948         more = self.runsource('\n'.join(self.buffer), self.filename)
        more = undefined
        self.runsource.join = undefined
        self.buffer = ['a']
        self.filename = '<ipython console>'
   1949         if not more:
   1950             self.resetbuffer()
   1951         return more
   1952 
   1953     def resetbuffer(self):
   1954         """Reset the input buffer."""
   1955         self.buffer[:] = []
   1956         
   1957     def raw_input(self,prompt='',continue_prompt=False):
   1958         """Write a prompt and read a line.
   1959 
   1960         The returned line does not include the trailing newline.
   1961         When the user enters the EOF key sequence, EOFError is raised.
   1962 
   1963         Optional inputs:

/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/magic.py in pxrunsource(self=<IPython.iplib.InteractiveShell object>, source='a', filename='<ipython console>', symbol='single')
    124         # Case 1
    125         self.showsyntaxerror(filename)
    126         return None
    127 
    128     if code is None:
    129         # Case 2
    130         return True
    131 
    132     # Case 3
    133     # Because autopx is enabled, we now call executeAll or disable autopx if
    134     # %autopx or autopx has been called
    135     if '_ip.magic("%autopx' in source or '_ip.magic("autopx' in source:
    136         _disable_autopx(self)
    137         return False
    138     else:
--> 139         self.activeController.iexecuteAll(source)
        self.activeController.iexecuteAll = <bound method PBInteractiveMultiEngineClient.iexecuteAll of <ipython1.kernel.multienginepb.PBInteractiveMultiEngineClient object at 0x2b067b832e10>>
        source = 'a'
    140         return False
    141         
    142 def magic_autopx(self, parameter_s=''):
    143     """Toggles auto parallel mode for the active IPython Controller.
    144     
    145     To activate a Controller in IPython, first create it and then call
    146     the activate() method.
    147     
    148     Then you can do the following:
    149      
    150     >>> %autopx                    # Now all commands are executed in parallel
    151     Auto Parallel Enabled
    152     Type %autopx to disable
    153     ...
    154     >>> %autopx                    # Now all commands are locally executed

/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py in iexecuteAll(self=<ipython1.kernel.multienginepb.PBInteractiveMultiEngineClient object>, lines='a')
    279                 if cmd_stderr:
    280                     print "%s[%s:%i]%s Err[%i]:\n%s %s" % \
    281                         (green, self.addr[0], target,
    282                         red, cmd_num, normal, cmd_stderr)
    283         return None
    284         
    285     def iexecute(self, targets, lines, block=None):
    286         d = self.execute(targets, lines, block=False)
    287         d.addCallback(self._printResult)
    288         if (self.block and block is None) or block:
    289             return self.blockOn(d)
    290         else:
    291             return d
    292         
    293     def iexecuteAll(self, lines):
--> 294         return self.iexecute('all', lines)
        self.iexecute = <bound method PBInteractiveMultiEngineClient.iexecute of <ipython1.kernel.multienginepb.PBInteractiveMultiEngineClient object at 0x2b067b832e10>>
        lines = 'a'
    295         
    296     def igetResult(self, targets, i=None):
    297         saveBlock = self.block
    298         self.block = False
    299         d = self.getResult(targets, i)
    300         d.addCallback(self._printResult)
    301         self.block = saveBlock
    302         return self._blockOrNot(d)   
    303     
    304     def igetResultAll(self, i=None):
    305         return self.igetResult('all', i)
    306     
    307     def _printQueueStatus(self, status):
    308         for e in status:
    309             print "Engine: ", e[0]

/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py in iexecute(self=<ipython1.kernel.multienginepb.PBInteractiveMultiEngineClient object>, targets='all', lines='a', block=None)
    274                     blue, cmd_num, normal, cmd_stdin)
    275                 if cmd_stdout:
    276                     print "%s[%s:%i]%s Out[%i]:%s %s" % \
    277                         (green, self.addr[0], target,
    278                         red, cmd_num, normal, cmd_stdout)
    279                 if cmd_stderr:
    280                     print "%s[%s:%i]%s Err[%i]:\n%s %s" % \
    281                         (green, self.addr[0], target,
    282                         red, cmd_num, normal, cmd_stderr)
    283         return None
    284         
    285     def iexecute(self, targets, lines, block=None):
    286         d = self.execute(targets, lines, block=False)
    287         d.addCallback(self._printResult)
    288         if (self.block and block is None) or block:
--> 289             return self.blockOn(d)
        self.blockOn = <bound method PBInteractiveMultiEngineClient.blockOn of <ipython1.kernel.multienginepb.PBInteractiveMultiEngineClient object at 0x2b067b832e10>>
        d = <Deferred at 0x2b067b6f93b0  current result: <twisted.python.failure.Failure exceptions.NameError>>
    290         else:
    291             return d
    292         
    293     def iexecuteAll(self, lines):
    294         return self.iexecute('all', lines)
    295         
    296     def igetResult(self, targets, i=None):
    297         saveBlock = self.block
    298         self.block = False
    299         d = self.getResult(targets, i)
    300         d.addCallback(self._printResult)
    301         self.block = saveBlock
    302         return self._blockOrNot(d)   
    303     
    304     def igetResultAll(self, i=None):

/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/multiengineclient.py in blockOn(self=<ipython1.kernel.multienginepb.PBInteractiveMultiEngineClient object>, d=<Deferred at 0x2b067b6f93b0  current result: <twisted.python.failure.Failure exceptions.NameError>>)
     72             
     73     def _setBlock(self, block):
     74         self._block = block
     75         if self.multiengine is not None:
     76             self.multiengine.block = block
     77     
     78     block = property(_getBlock, _setBlock, None, None)
     79     
     80     def __init__(self, addr):
     81         self.addr = addr
     82         self.multiengine = None
     83         self._block = True
     84         self.connected = False
     85                            
     86     def blockOn(self, d):
---> 87         return blockOn(d)
        global blockOn = <function blockOn at 0x2b067b46d758>
        d = <Deferred at 0x2b067b6f93b0  current result: <twisted.python.failure.Failure exceptions.NameError>>
     88             
     89     def _blockOrNot(self, d):
     90         if self._block:
     91             return self.blockOn(d)
     92         else:
     93             return d
     94 
     95     #---------------------------------------------------------------------------
     96     # Methods for subclasses to override
     97     #---------------------------------------------------------------------------
     98             
     99     def connect(self):
    100         """Create self.multiengine and set self.connected to True.
    101         
    102         Implementers of this method must also (after creating self.multiengine)

/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/blockon.py in blockOn(deferrable=[<Deferred at 0x2b067b6f93b0  current result: <twisted.python.failure.Failure exceptions.NameError>>], fireOnOneCallback=0, fireOnOneErrback=0, consumeErrors=0)
    141         deferrable = [deferrable]
    142     
    143     # Add a check to simply pass through plain objects.
    144     for i in range(len(deferrable)):
    145         if hasattr(deferrable[i], '__defer__'):
    146             deferrable[i] = deferrable[i].__defer__()
    147     
    148     d = gatherBoth(deferrable,
    149                    fireOnOneCallback, 
    150                    fireOnOneErrback,
    151                    consumeErrors,
    152                    logErrors=0)
    153     if not fireOnOneCallback:
    154         d.addCallback(_parseResults)
    155     bd = BlockingDeferred(d)
--> 156     return bd.blockOn()
        bd.blockOn = <bound method BlockingDeferred.blockOn of <ipython1.kernel.blockon.BlockingDeferred object at 0x2b067b90b410>>
    157     
    158 
    159 # Start the reactor
    160 startReactor()
    161 
    162 
    163 
    164 
    165 
    166 
    167 
    168 
    169 
    170 
    171 

/home/djones/local/ipython_saw/lib64/python2.4/site-packages/ipython1/kernel/blockon.py in blockOn(self=<ipython1.kernel.blockon.BlockingDeferred object>)
     85         On success this will return the result.
     86         
     87         On failure, it will raise an exception.
     88         """
     89         
     90         self.d.addBoth(self.gotResult)
     91         self.d.addErrback(self.gotFailure)
     92         
     93         while not self.finished:
     94             reactor.iterate(TIMEOUT)
     95             self.count += 1
     96         
     97         if isinstance(self.d.result, dict):
     98             f = self.d.result.get('failure', None)
     99             if isinstance(f, failure.Failure):
--> 100                 f.raiseException()
        f.raiseException = <bound method Failure.raiseException of <twisted.python.failure.Failure exceptions.NameError>>
    101         return self.d.result
    102 
    103     def gotResult(self, result):
    104         self.finished = True
    105         return result
    106         
    107     def gotFailure(self, f):
    108         self.finished = True
    109         # Now make it look like a success so the failure isn't unhandled
    110         return {'failure':f}
    111         
    112         
    113 def _parseResults(result):
    114     if isinstance(result, (list, tuple)):
    115         if len(result) == 1:

/usr/lib64/python2.4/site-packages/twisted/python/failure.py in raiseException(self=<twisted.python.failure.Failure exceptions.NameError>)
    244         @returns: the matching L{Exception} type, or None if no match.
    245         """
    246         for error in errorTypes:
    247             err = error
    248             if inspect.isclass(error) and issubclass(error, Exception):
    249                 err = reflect.qual(error)
    250             if err in self.parents:
    251                 return error
    252         return None
    253 
    254     def raiseException(self):
    255         """
    256         raise the original exception, preserving traceback
    257         information if available.
    258         """
--> 259         raise self.type, self.value, self.tb
        self.type = <class exceptions.NameError at 0x2b0675de65f0>
        self.value = <exceptions.NameError instance at 0x2b067b6f8518>
        self.tb = None
    260 
    261 
    262     def __repr__(self):
    263         return "<%s %s>" % (self.__class__, self.type)
    264 
    265     def __str__(self):
    266         return "[Failure instance: %s]" % self.getBriefTraceback()
    267 
    268     def __getstate__(self):
    269         """Avoid pickling objects in the traceback.
    270         """
    271         if self.pickled:
    272             return self.__dict__
    273         c = self.__dict__.copy()
    274         

NameError: 

***************************************************************************

History of session input:
import ipython1.kernel.api as api
rc = api.RemoteController(('localhost',10111))
rc.connect()
rc.activate()
rc.executeAll("a")
_ip.magic("%autopx ")
a

*** Last line of input (may not be in above history):
a


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