对于HTTPS，默认情况下，启用SSL验证，如果无法验证SSL证书，将会引发SSLError，不做处理就会如1所示，酱紫的：
1、requests.exceptions.SSLError: ("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')],)",)
解决办法：

    # 在requests中加入这个 忽略SSL证书 verify=False
    url = "https://www.baidu.com/"
    res = requests.get(url,timeout=30,verify=False).content
    print res

2、自步骤1之后，会出现 酱紫的 警告： C:\Python27\lib\site-packages\urllib3\connectionpool.py:852: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings InsecureRequestWarning)
解决办法：

    #代码页加入以下这个
    from requests.packages.urllib3.exceptions import InsecureRequestWarning
    # 禁用安全请求警告
    requests.packages.urllib3.disable_warnings(InsecureRequestWarning)