title: Python framework best suited for building a 2-sided marketplace
body: <p>I am planning to develop a 2-sided marketplace which will have much of the functionality of Odesk.com. I'm aware that certain python frameworks lend themselves innately to certain types of projects (i.e. Django for blogs/CMS-type apps; Tornado for social networks; etc.) and was wondering if there is a framework, hopefully python3-ready, that is especially suitable for building out this sort of platform/marketplace. I will have user accounts on both sides, payment system, private communications/messaging, project management and workflow tools, etc. </p>
  
  <p>Corollary: I am tempted to start with Flask, as I'm attracted to it's lightweight design. But will Flask be able to handle the complexities of a marketplace app?</p>
  
  <p>Thanks in advance.</p>