Did you forget the link? :) <a href="http:&#x2F;&#x2F;iamtrask.github.io&#x2F;2015&#x2F;07&#x2F;12&#x2F;basic-python-network&#x2F;" rel="nofollow">http:&#x2F;&#x2F;iamtrask.github.io&#x2F;2015&#x2F;07&#x2F;12&#x2F;basic-python-network&#x2F;</a>