Viewing file: pygst.py (2.01 KB) -rw-r--r-- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
# -*- Mode: Python; py-indent-offset: 4 -*- # pygst - Python bindings for the GStreamer multimedia framework. # Copyright (C) 1998-2002 James Henstridge # (C) 2005 Edward Hervey # # pygst.py: pygst version selection code. # # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Library General Public # License as published by the Free Software Foundation; either # version 2 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Library General Public License for more details. # # You should have received a copy of the GNU Library General Public # License along with this library; if not, write to the # Free Software Foundation, Inc., 59 Temple Place - Suite 330, # Boston, MA 02111-1307, USA. # # This allows parallel installation of gst-python # # In order to have backward compatibility
import sys import os.path
__all__ = ['require']
_pygst_dir = os.path.dirname(__file__) + '/gst-0.10'
_pygst_version = '0.10'
_pygst_required_version = None
class RequiredVersionError(ValueError, AssertionError): # AssertionError is subclassed for compatibility reasons. pass
def require(version): global _pygst_required_version
if _pygst_required_version != None: if _pygst_required_version != version: raise RequiredVersionError, "a different version of gst was already required" else: return
if sys.modules.has_key('gst'): raise RequiredVersionError, "pygst.require() must be called before importing gst"
if version != _pygst_version: raise RequiredVersionError, "Only version '%s' is available" % _pygst_version
# move the pygst path to the front while _pygst_dir in sys.path: sys.path.remove(_pygst_dir) sys.path.insert(0, _pygst_dir) _pygst_required_version = version
|