graphdoc.py 文件源码

def close(self):
        """ Implements GVPngDoc.close() """
        GVDocBase.close(self)

        # Make sure the extension is correct
        if self._filename[-4:] != ".png":
            self._filename += ".png"

        # Create a temporary dot file
        (handle, tmp_dot) = tempfile.mkstemp(".gv" )
        dotfile = os.fdopen(handle, "wb")
        dotfile.write(self._dot.getvalue())
        dotfile.close()
        # Generate the PNG file.
        os.system( 'dot -Tpng -o"%s" "%s"' % (self._filename, tmp_dot) )

        # Delete the temporary dot file
        os.remove(tmp_dot)

#-------------------------------------------------------------------------------
#
# GVJpegDoc
#
#-------------------------------------------------------------------------------