错误信息

TraitError: Could not decode 're.findall("\xe6\x9d\xa5\xe6\xba\x90\xef\xbc\x9a(.*)", web_source_info.encode("utf-8"))' for unicode trait '_i00' of a HistoryManager instance.

原因是网站的源码 编码格式不对

改下网站源码编码再匹配即可

root = Selector(type="html",text=response.body.decode('gb2312'))
web_source_info=""
web_source_arr = re.findall(u"来源：(.*)", web_source_info)