def graph(self, **kw):
        """Set up a graphviz graph context.
        """
        self.name = kw.get('name', 'G')
        self.fillcolor = kw.get('fillcolor', '#ffffff')
        self.fontcolor = kw.get('fontcolor', '#000000')
        self.rankdir = kw.get('rankdir', 'BT' if self.reverse else 'TB')
        if kw.get('concentrate', True):
            self.concentrate = 'concentrate = true;'
        else:
            self.concentrate = ''
        self.dedent("""
            digraph {self.name} {{
                {self.concentrate}
                rankdir = {self.rankdir};
                node [style=filled,fillcolor="{self.fillcolor}",fontcolor="{self.fontcolor}",fontname=Helvetica,fontsize=10];

        """.format(self=self))
        yield
        self.writeln('}')
def graph ( self , ** kw ) : self . name = kw . get ( 'name' , 'G' ) self . fillcolor = kw . get ( 'fillcolor' , '#ffffff' ) self . fontcolor = kw . get ( 'fontcolor' , '#000000' ) self . rankdir = kw . get ( 'rankdir' , 'BT' if self . reverse else 'TB' ) if kw . get ( 'concentrate' , True ) : self . concentrate = 'concentrate = true;' else : self . concentrate = '' self . dedent ( """
            digraph {self.name} {{
                {self.concentrate}
                rankdir = {self.rankdir};
                node [style=filled,fillcolor="{self.fillcolor}",fontcolor="{self.fontcolor}",fontname=Helvetica,fontsize=10];
        """ . format ( self = self ) ) yield self . writeln ( '}' )
Set up a graphviz graph context.