[gstreamer-bugs] [Bug 576145] New: pygst programs skip python plugins on registry update

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-python | Ver: git
           Summary: pygst programs skip python plugins on registry update
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-python
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: mail at renestadler.de
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


I noticed that pygst programs print this every now and then on import gst:

AttributeError: 'module' object has no attribute 'Element'

Turns out that when a pygst program triggers a registry update, python plugins
are skipped. The problem is that when "import gst" triggers the registry
update, the python plugin loader also imports the gst module -- which at that
point is only partially initialized. It's a tricky circular dependency because
any python plugin needs the gst module fully setup in order to declare a
gst.Element subclass on import time.


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