我目前收到此错误，不知道是什么意思。它是一个python项目，这是我看到的错误：

  File "/bp_scraper/bp_scraper/httpmiddleware.py", line 22, in from_crawler
    return cls(crawler.settings)
  File "/bp_scraper/bp_scraper/httpmiddleware.py", line 12, in __init__
    if parts[1]:
TypeError: '_sre.SRE_Match' object has no attribute '__getitem__'

代码：

import re
import random
import base64
from scrapy import log
class RandomProxy(object):
    def __init__(self, settings):
        self.proxy_list = settings.get('PROXY_LIST')
        f = open(self.proxy_list)

        self.proxies = {}
        for l in f.readlines():
            parts = re.match('(\w+://)(\w+:\w+@)?(.+)', l)

            if parts[1]:
                parts[1] = parts[1][:-1]

            self.proxies[parts[0] + parts[2]] = parts[1]

        f.close()
    @classmethod
    def from_crawler(cls, crawler):
        return cls(crawler.settings)

在此先感谢你的帮助！