自从安装pip以来，我一直在收到如下消息：
root@nas:~# pip install requests
Collecting requests
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:318: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
SNIMissingWarning
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Downloading requests-2.18.4-py2.py3-none-any.whl (88kB)
100% |████████████████████████████████| 92kB 996kB/s
Requirement already satisfied: certifi>=2017.4.17 in /usr/local/lib/python2.7/dist-packages (from requests)
Collecting chardet<3.1.0,>=3.0.2 (from requests)
Downloading chardet-3.0.4-py2.py3-none-any.whl (133kB)
100% |████████████████████████████████| 143kB 2.5MB/s
Requirement already satisfied: idna<2.7,>=2.5 in /usr/local/lib/python2.7/dist-packages (from requests)
Requirement already satisfied: urllib3<1.23,>=1.21.1 in /usr/local/lib/python2.7/dist-packages (from requests)
Installing collected packages: chardet, requests
Successfully installed chardet-3.0.4 requests-2.18.4
我尝试pip install pyopenssl运行pip install urllib3[secure]，然后>>> import urllib3.contrib.pyopenssl
>>> urllib3.contrib.pyopenssl.inject_into_urllib3()
。之后我打开了Python解释器并运行：
printf("%s,",ctime((const time_t*)&header->ts.tv_sec));
没有骰子。仍在获取SNIMissingWarning和InsecurePlatformWarning消息。