[Paraview] Problem with disconnecting from the builtin server in pvpython

[logari81]

Thank you for the quick response. You are right, what I actually need is
to clear the pipeline. Your snippet seems to work well except some
naming counters which are not reset but in my use case this isn't very
important.

Thanks a lot for your help.

Best Regards

Kostas

On Wed, 2010-09-15 at 15:49 -0400, pat marion wrote:
> If your intention is to just clear the pipeline, try this code, copied
> from the paraview coprocessor template:
> 
> def GetProxiesToDelete():
>     iter = servermanager.vtkSMProxyIterator()
>     iter.Begin()
>     tobedeleted = []
>     while not iter.IsAtEnd():
>       if iter.GetGroup().find("prototypes") != -1:
>          iter.Next()
>          continue
>       proxy = servermanager._getPyProxy(iter.GetProxy())
>       proxygroup = iter.GetGroup()
>       iter.Next()
>       if proxygroup != 'timekeeper' and proxy != None and
> proxygroup.find("pq_helper_proxies") == -1 :
>           tobedeleted.append(proxy)
> 
>     return tobedeleted
> 
> # explicitly delete the proxies -- we do it this way to avoid problems
> with prototypes
> tobedeleted = GetProxiesToDelete()
> while len(tobedeleted) > 0:
>    Delete(tobedeleted[0])
>    tobedeleted = GetProxiesToDelete()
> 
> 
> On Wed, Sep 15, 2010 at 3:21 PM, pat marion <pat.marion at kitware.com>
> wrote:
>         I'm afraid your use case is not well supported.  There is
>         logic in the paraview gui application that ensures a clean
>         disconnect, which includes a hard reset of the python
>         interpreter context.  Using only python modules, there is
>         manual clean up required after a disconnect that is not yet
>         supported.
>         
>         You might find that your script still works, you'll just be be
>         spammed with those error messages.  Also, try calling
>         Connect() instead of servermanager.Disconnect(...).  This will
>         disconnect & reconnect a little more cleanly, but still not
>         perfect.
>         
>         Pat
>         
>         
>         
>         
>         On Wed, Sep 15, 2010 at 2:52 PM, logari81
>         <logari81 at googlemail.com> wrote:
>                 In the meanwhile I have realized that the error occurs
>                 only when I
>                 include a Delete() statement in my script. Thus the
>                 following very
>                 simple script reproduces the error:
>                 
>                 import sys
>                 sys.path.append('/usr/lib/paraview')
>                 from paraview.simple import *
>                 cone = Cone()
>                 Delete(cone)
>                 servermanager.Disconnect(servermanager.ActiveConnection)
>                 
>                 Hopefully someone can explain this behavior.
>                 
>                 Best Regards
>                 
>                 Kostas
>                 
>                 
>                 
>                 On Wed, 2010-09-15 at 18:59 +0200, logari81 wrote:
>                 > Hi,
>                 >
>                 > actually I have the same question as in this
>                 previous email:
>                 >
>                 >
>                 http://www.paraview.org/pipermail/paraview/2008-March/007506.html
>                 >
>                 > I use the python interface in an application that I
>                 am developing and I
>                 > import paraview with:
>                 >
>                 > from paraview.simple import *
>                 >
>                 > During the import a connection to the builtin server
>                 is also established
>                 > silently. Though, in my application I need to clear
>                 the pipeline
>                 > occasionally in order to begin with a new output, so
>                 I tried
>                 > disconnecting from the server with:
>                 >
>                 >
>                 servermanager.Disconnect(servermanager.ActiveConnection)
>                 >
>                 > but I receive the error:
>                 >
>                 > ERROR:
>                 >
>                 In /build/buildd/paraview-3.8.0/Servers/Common/vtkProcessModuleConnectionManager.cxx, line 175
>                 > vtkProcessModuleConnectionManager (0x1d33240):
>                 Invalid connection ID: 5
>                 >
>                 > This behavior is tested with ParaView 3.8.0 on
>                 Ubuntu 10.04.
>                 >
>                 > I would be glad for any hints.
>                 >
>                 > Kind Regards
>                 >
>                 > Kostas
>                 >
>                 
>                 
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