Python is used successfully in thousands of real-world business applications around the world, including many large and mission critical systems.
Python offers many choices for web development:
Frameworks such as Django and Pyramid.
Micro-frameworks such as Flask and Bottle.
Advanced content management systems such as Plone and django CMS.
Python's standard library supports many Internet protocols:
HTML and XML
Easy-to-use socket interface.
And the Package Index has yet more libraries:
Requests, a powerful HTTP client library.
BeautifulSoup, an HTML parser that can handle all sorts of oddball HTML.
Feedparser for parsing RSS/Atom feeds.
Paramiko, implementing the SSH2 protocol.
Twisted Python, a framework for asynchronous network programming.