Re: [spyder] Re: Random tracebacks in 2.1

Sun, 16 Oct 2011 18:10:10 -0700

Yep, I noticed the comment but since I'm not really sure what refresh_plugin does, I just commented it. I agree with you that the best solution would be to disable it during startup.
This bug really bothers me because it shuts down the object inspector and sometimes messes the code completion in the console. Besides, I would like to add that my machine is an i7 quad core running Linux, so this not only happens on slow machines. 

Cheers,
Carlos

El 16/10/11 15:20, Pierre Raybaut escribió:

Ok Carlos, this does not surprise me as I have encountered similar issues:
http://code.google.com/p/spyderlib/source/detail?r=0282cbd8f5f036bfb6254b235a5f9d9594128129
Socket communication fails during startup on "slow" machines (at least
I have never seen this bug on my different machines at work, and I see
it on a quite slow machine at home). And with these bugs, this refresh
plugin line was part of the traceback too.

You certainly have noticed the "#XXX Is it a good idea?" comment that
I wrote a long time ago when building the plugin interface. Honestly
I'm not sure to remember why exactly this could be a bad idea but I
think it had something to do with to many 'refresh_plugin' calls
leading to an inefficient implementation.

Now, commenting this line could be the solution. But the best solution
may be to disable this refresh_plugin method during Spyder's startup
-- with a timer or something like that.

-Pierre

2011/10/16 Carlos Córdoba<[email protected]>:

I think I've found one reason for these tracebacks. They seem to happen
during the initialization of plugins and they're generated by trying to
refresh the plugins too early during startup, which is done here:

diff -r 4b43639efb69 spyderlib/plugins/__init__.py
--- a/spyderlib/plugins/__init__.py    dom oct 16 15:06:11 2011 +0200
+++ b/spyderlib/plugins/__init__.py    dom oct 16 11:59:05 2011 -0500
@@ -195,7 +195,8 @@ class SpyderPluginMixin(object):
         if self.DISABLE_ACTIONS_WHEN_HIDDEN:
             toggle_actions(self.plugin_actions, visible)
         if visible:
-            self.refresh_plugin() #XXX Is it a good idea?
+            #self.refresh_plugin() #XXX Is it a good idea?
+            pass
         self.isvisible = enable and visible

     def set_option(self, option, value):

If I comment that line, then the tracebacks doesn't happen anymore (at least
I didn't see any after several hours of work)

Cheers,
Carlos

El 11/09/11 11:57, Carlos Córdoba escribió:

I'm getting this traceback from time to time, in a kind of random,
unpredictable fashion (at least for me):

Traceback (most recent call last):
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 297, in keyPressEvent
    self.postprocess_keyevent(event)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 777, in postprocess_keyevent
    ShellBaseWidget.postprocess_keyevent(self, event)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 352, in postprocess_keyevent
    self._key_tab()
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 809, in _key_tab
    self.show_code_completion(automatic=False)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 941, in show_code_completion
    obj_list = self.get_module_completion(text)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/externalshell/pythonshell.py",
line 121, in get_module_completion
    return self.ask_monitor("getmodcomplist('%s')" % objtxt)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/externalshell/pythonshell.py",
line 72, in ask_monitor
    return communicate(sock, command, settings=settings)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/utils/bsdsocket.py",
line 56, in communicate
    return read_packet(sock)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/utils/bsdsocket.py",
line 31, in read_packet
    dlen, = struct.unpack("l", datalen)
struct.error: unpack requires a string argument of length 8

Sometimes this is accompanied of this other traceback:

Traceback (most recent call last):
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/plugins/inspector.py",
line 366, in refresh_plugin
    self.set_object_text(None, force_refresh=False)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/plugins/inspector.py",
line 529, in set_object_text
    found = self.show_help(text, ignore_unknown=ignore_unknown)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/plugins/inspector.py",
line 698, in show_help
    if self.shell.is_defined(obj_text):
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/externalshell/pythonshell.py",
line 114, in is_defined
    % (objtxt, force_import))
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/externalshell/pythonshell.py",
line 73, in ask_monitor
    return communicate(sock, command, settings=settings)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/utils/bsdsocket.py",
line 56, in communicate
    return read_packet(sock)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/utils/bsdsocket.py",
line 34, in read_packet
    data += sock.recv(dlen)
OverflowError: signed integer is greater than maximum

and other times it only appears this one:

Traceback (most recent call last):
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 297, in keyPressEvent
    self.postprocess_keyevent(event)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 777, in postprocess_keyevent
    ShellBaseWidget.postprocess_keyevent(self, event)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 352, in postprocess_keyevent
    self._key_tab()
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 809, in _key_tab
    self.show_code_completion(automatic=False)
  File
"/home/carlos/.virtualenvs/spyder_trunk/lib/python2.7/site-packages/spyderlib/widgets/shell.py",
line 986, in show_code_completion
    b_k_g = dir(__builtin__)+self.get_globals_keys()+keyword.kwlist
TypeError: can only concatenate list (not "NoneType") to list

This is happening to me from some time now, I don't remember exactly since
when.

All these tracebacks seem to imply that monitor communication channels are
somehow shutdown, which breaks code completion. But how this can happen and
be fixed?

Cheers,
Carlos

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