How to use the pygraphviz.__version__.rstrip function in pygraphviz

def render_output(self, dotdata, **kwargs):
        try:
            import pygraphviz
        except ImportError:
            raise CommandError("You need to install pygraphviz python module")

        vizdata = ' '.join(dotdata.split("\n")).strip().encode('utf-8')
        version = pygraphviz.__version__.rstrip("-svn")
        try:
            if [int(v) for v in version.split('.')] < (0, 36):
                # HACK around old/broken AGraph before version 0.36 (ubuntu
                # ships with this old version)
                import tempfile
                tmpfile = tempfile.NamedTemporaryFile()
                tmpfile.write(vizdata)
                tmpfile.seek(0)
                vizdata = tmpfile.name
        except ValueError:
            pass

        graph = pygraphviz.AGraph(vizdata)
        graph.layout(prog=kwargs['layout'])
        graph.draw(kwargs['outputfile'])

def render_output_pygraphviz(self, dotdata, **kwargs):
        """Renders the image using pygraphviz"""
        if not HAS_PYGRAPHVIZ:
            raise CommandError("You need to install pygraphviz python module")

        version = pygraphviz.__version__.rstrip("-svn")
        try:
            if tuple(int(v) for v in version.split('.')) < (0, 36):
                # HACK around old/broken AGraph before version 0.36 (ubuntu ships with this old version)
                import tempfile
                tmpfile = tempfile.NamedTemporaryFile()
                tmpfile.write(dotdata)
                tmpfile.seek(0)
                dotdata = tmpfile.name
        except ValueError:
            pass

        graph = pygraphviz.AGraph(dotdata)
        graph.layout(prog=kwargs['layout'])
        graph.draw(kwargs['outputfile'])

def render_output(self, dotdata, **kwargs):
        try:
            import pygraphviz
        except ImportError, e:
            raise CommandError("need pygraphviz python module ( apt-get install python-pygraphviz )")

        vizdata = ' '.join(dotdata.split("\n")).strip()
	version = pygraphviz.__version__.rstrip("-svn")
	try:
	    if [int(v) for v in version.split('.')]<(0,36):
                # HACK around old/broken AGraph before version 0.36 (ubuntu ships with this old version)
                import tempfile
                tmpfile = tempfile.NamedTemporaryFile()
                tmpfile.write(vizdata)
                tmpfile.seek(0)
                vizdata = tmpfile.name
	except ValueError:
	    pass

        graph = pygraphviz.AGraph(vizdata)
        graph.layout(prog=kwargs['layout'])
        graph.draw(kwargs['outputfile'])

def render_output_pygraphviz(self, dotdata, **kwargs):
        """Renders the image using pygraphviz"""
        if not HAS_PYGRAPHVIZ:
            raise CommandError("You need to install pygraphviz python module")

        version = pygraphviz.__version__.rstrip("-svn")
        try:
            if tuple(int(v) for v in version.split('.')) < (0, 36):
                # HACK around old/broken AGraph before version 0.36 (ubuntu ships with this old version)
                import tempfile
                tmpfile = tempfile.NamedTemporaryFile()
                tmpfile.write(dotdata)
                tmpfile.seek(0)
                dotdata = tmpfile.name
        except ValueError:
            pass

        graph = pygraphviz.AGraph(dotdata)
        graph.layout(prog=kwargs['layout'])
        graph.draw(kwargs['outputfile'])