运行提示cookie.py中67行中的全局变量json没有初始化

[dadahua555]

2019-01-20 16:09:04 [twisted] CRITICAL:
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
result = g.send(result)
File "/usr/lib64/python2.7/site-packages/scrapy/crawler.py", line 98, in crawl
six.reraise(*exc_info)
File "/usr/lib64/python2.7/site-packages/scrapy/crawler.py", line 80, in crawl
self.engine = self._create_engine()
File "/usr/lib64/python2.7/site-packages/scrapy/crawler.py", line 105, in _create_engine
return ExecutionEngine(self, lambda _: self.stop())
File "/usr/lib64/python2.7/site-packages/scrapy/core/engine.py", line 69, in init
self.downloader = downloader_cls(crawler)
File "/usr/lib64/python2.7/site-packages/scrapy/core/downloader/init.py", line 88, in init
self.middleware = DownloaderMiddlewareManager.from_crawler(crawler)
File "/usr/lib64/python2.7/site-packages/scrapy/middleware.py", line 58, in from_crawler
return cls.from_settings(crawler.settings, crawler)
File "/usr/lib64/python2.7/site-packages/scrapy/middleware.py", line 34, in from_settings
mwcls = load_object(clspath)
File "/usr/lib64/python2.7/site-packages/scrapy/utils/misc.py", line 44, in load_object
mod = import_module(module)
File "/usr/lib64/python2.7/importlib/init.py", line 37, in import_module
import(name)
File "/home/bc/github_spider/SinaSpider/Sina_spider1/Sina_spider1/middleware.py", line 3, in
from cookies import cookies
File "/home/bc/github_spider/SinaSpider/Sina_spider1/Sina_spider1/cookies.py", line 151, in
cookies = getCookies(myWeiBo)
File "/home/bc/github_spider/SinaSpider/Sina_spider1/Sina_spider1/cookies.py", line 144, in getCookies
cookie = getCookie(account, password)
File "/home/bc/github_spider/SinaSpider/Sina_spider1/Sina_spider1/cookies.py", line 36, in getCookie
return get_cookie_from_login_sina_com_cn(account, password)
File "/home/bc/github_spider/SinaSpider/Sina_spider1/Sina_spider1/cookies.py", line 67, in get_cookie_from_login_sina_com_cn
info = json.loads(jsonStr)
NameError: global name 'json' is not defined
求解...