Python pygments 模块，styles() 实例源码

def _on_config_changed(self, junk=None):
        # when the font family or size changes, self.textwidget['font']
        # also changes because it's a porcupine.textwiddet.ThemedText widget
        fontobject = tkfont.Font(name=self.textwidget['font'], exists=True)
        font_updates = fontobject.actual()
        del font_updates['weight']     # ignore boldness
        del font_updates['slant']      # ignore italicness

        for (bold, italic), font in self._fonts.items():
            # fonts don't have an update() method
            for key, value in font_updates.items():
                font[key] = value

        # http://pygments.org/docs/formatterdevelopment/#styles
        # all styles seem to yield all token types when iterated over,
        # so we should always end up with the same tags configured
        style = pygments.styles.get_style_by_name(config['pygments_style'])
        for tokentype, infodict in style:
            # this doesn't use underline and border
            # i don't like random underlines in my code and i don't know
            # how to implement the border with tkinter
            key = (infodict['bold'], infodict['italic'])   # pep8 line length
            kwargs = {'font': self._fonts[key]}
            if infodict['color'] is None:
                kwargs['foreground'] = ''    # reset it
            else:
                kwargs['foreground'] = '#' + infodict['color']
            if infodict['bgcolor'] is None:
                kwargs['background'] = ''
            else:
                kwargs['background'] = '#' + infodict['bgcolor']

            self.textwidget.tag_config(str(tokentype), **kwargs)

            # make sure that the selection tag takes precedence over our
            # token tag
            self.textwidget.tag_lower(str(tokentype), 'sel')

    # handle things from the highlighting process