小白接口（YesApi.cn）Python SDK包
文档地址: http://api.okayapi.com/docs.php
用法：
yes = YesApi(api_url='http://xxx.com', app_key='xxxx',
app_secret='xxxxx')
params = {'s': 'App.Captcha.Create'}
with open('yzm.jpeg', 'wb+') as f:
rsp = yes.http_get(params=params)
f.write(rsp.content)