import requests, json
from io import BytesIO
from PIL import Image

qrAllUrl = 'https://login.sina.com.cn/sso/qrcode/image?entry=weibo&size=180&callback=STK_' + str(int(time.time()))

print(requests.get(qrAllUrl).text)

qrJson = json.loads(re.findall(r'([)]', requests.get(qrAllUrl).text)[0])['data']

print(qrJson)

qrUrl = qrJson.get('image')
qrId = qrJson['qrid']
qrEcho = BytesIO(requests.get('https:' + qrUrl).content)
Image.open(qrEcho).show() # 展示二维码
qrCheckUrl = 'https://login.sina.com.cn/sso/qrcode/check?entry=sso&qrid=' + qrId + '&callback=STK_' + str(int(time.time()))
qrCheckResponse = ''
i = 0
while 'succ' not in qrCheckResponse:
i += 1
print('第{}次查看是否成功请求...'.format(i))
qrCheckResponse = requests.get(qrCheckUrl).text
time.sleep(2)
altUrl = json.loads(re.findall(r'([)]', qrCheckResponse)[0])['data']['alt']
coreUrl = 'https://login.sina.com.cn/sso/login.php?entry=qrcodesso&returntype=TEXT&crossdomain=1&cdult=3&domain=weibo.com&alt=' + altUrl + '&savestate=3&callback=STK_' + str(time.time())
print(coreUrl)
loginUrl = requests.get(coreUrl).headers
print(loginUrl)
weiboCookies = dict(loginUrl)['Set-Cookie']
print(weiboCookies)
print('SUB=' + re.findall(r'SUB=(.*?);', weiboCookies)[0])