pygments_code_block_directive.py 文件源码

def lex(self):
        # Get lexer for language (use text as fallback)
        try:
            if self.language and unicode(self.language).lower() <> 'none':
                lexer = get_lexer_by_name(self.language.lower(),
                                        **self.custom_args
                                        )
            else:
                lexer = get_lexer_by_name('text', **self.custom_args)
        except ValueError:
            log.info("no pygments lexer for %s, using 'text'" \
                % self.language)
            # what happens if pygment isn't present ?
            lexer = get_lexer_by_name('text')
        return pygments.lex(self.code, lexer)