在Python中使用re将CSV单元格值用作正则表达式字符串

所以我有一个CSV文档，每行有元数据、XPATH和正则表达式字符串。脚本使用xpath来迭代API请求，然后我想使用存储在CSV中的正则表达式和该xpath来搜索API结果中的内容。我的问题是如何使用CSV行中的数据作为文本regex搜索字符串，比如

r'^\w{2}.+'

与要搜索的字符串

with open(rules, 'r+') as rulefile:
    rreader = csv.DictReader(rulefile)
    for row in rreader:
        for ip, apikey in keydict.iteritems():
            rulequery = {'type': 'config', 'action': 'get', 'key': apikey, 'xpath': row["xpath"]}
            rrule = requests.get('https://' + ip + '/api', params = rulequery, verify=False)
            rrex = re.compile('{}'.format(row["regex"]), re.MULTILINE)
            for line in rrule.text:
                config = rrex.findall(line)
                print(config)

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所以我想我可能已经找到了一个解决办法，虽然我不确定这是最好的。。。如果有人有更好的方法，欢迎提供帮助

with open(rules, 'r+') as rulefile:
rreader = csv.DictReader(rulefile)
for row in rreader:
    for ip, apikey in keydict.iteritems():
        regex = row["regex"]
        rulequery = {'type': 'config', 'action': 'get', 'key': apikey, 'xpath': row["xpath"]}
        rrule = requests.get('https://' + ip + '/api', params = rulequery, verify=False)
        config = re.search(regex, rrule.text)
        print rrule.text[config.start():config.end()]

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问题是什么？它不起作用了？你有错误吗？没有它只是返回。。。[] [] [] [] [] [] [] [] [] []