python resolves snimissingwarning and insecureplatformwarning warnings

Snimissingwarning and insecureplatformwarning warnings are raised at runtime when crawling dynamic websites such as watercress

Detailed warnings are as follows:

D:\python2.7.8\lib\site-packages\requests\packages\urllib3\util\ssl_.py:315:snimissingwarning:an HTTPS Request have been made, but the SNI (Subject Name Indication) extension to TLS are not available on this platform. This could cause the server to present an incorrect TLS certificate, which can cause validation failures. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#snimissingwarning.
Snimissingwarning

D:\python2.7.8\lib\site-packages\requests\packages\urllib3\util\ssl_.py:120:insecureplatformwarning:a true Sslcontext object is not available. This prevents URLLIB3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
Insecureplatformwarning Workaround: Enter in cmd:pip install Pyopenssl ndg-httpsclient pyasn1

python resolves snimissingwarning and insecureplatformwarning warnings