Django:
General view:
Personally, Django is fairly balanced and useful. like Django 's Model and Template, you can use it, you don't have to, you don't have to force it. So Django is a heavyweight, and it's probably smattering.
For general Web applications, it is highly recommended to use Django.
If content-based Web site Django is a relatively good choice, such as blog , such as the background, form and ORM is very convenient. The downside is that it's too big to use Django 's home without the good stuff, and the coupling between modules is serious.
Negative reasons:
The frame is too complex and too slow to be efficient
Tornado:
General view:
In many cases the petite elegance of web.py enough, personally like tornado If you are building a Span style= "Font-family:times New Roman" >web application words more recommended tornado tornado similar web.py xd is designed for webapp node.js
Advantages: Fast speed,gae support better;
Sure reason: small and efficient
web.py:
General view:
Do blog django Labor-saving, definition MODELS,  writing a front desk is basically done. &NBSP, tornado flexible Span style= "Font-family:times New Roman" >,  webpy webpy The author's been gone so long. ,  This kind of single-player-dominated project has not experienced normal excesses, After some existing applications have been moved out, a small number of maintainers out of the ,  ,  should not be considered at all.
web.py can be small site ah, very convenient, unit internal data synchronization ah what. I am sure of the value of its existence.
Negative reason: This framework is likely to be unsupported in the future
Flask:
General view:
Advantages: Active development, fast version upgrade, multi-function, rich documentation;
Disadvantage: low efficiency, insufficient support for Gae ;
If your environment is Linux,OS X or Cygwin, use the following command to install flask and expansion packs, one by one:
Flask/bin/pip Install flask
Flask/bin/pip Install Flask-login
Flask/bin/pip Install Flask-openid
Flask/bin/pip Install Flask-mail
Flask/bin/pip Install Flask-sqlalchemy
Flask/bin/pip Install Sqlalchemy-migrate
Flask/bin/pip Install Flask-whooshalchemy
Flask/bin/pip Install FLASK-WTF
Flask/bin/pip Install Flask-babel
Flask/bin/pip Install Flup
Negative reasons: A component, installation too troublesome
Bottle:
General view:
Need to implement too many things, plus do not know what performance will be;
Negative reasons:
Bottle has only one file, but lacks session support.
Selection of Python framework for Web simple application-tornado