I also use Python for any other purposes (console programs, scripts, long-running processes, batches). I had a look at Webpy, Django and Turbogears but I don't feel comfortable with those framework for little web apps.
What's your choice?
Other people find Java easier to use, it comes down to what you know.
Just a point of caution, the only 'little web apps' that I know of are the ones that got abandoned, what might seen trivial now could grow quite large and the effort made to use a good framework can pay off down the road.
Also knowing a framework de jour is not a bad thing CV wise.
In fact, I just want to build little apps (a few pages, an embedded gmap with some info added through the admin and some mice) in a few hours. Maintaining my own libs is something I'd like to avoid using self-mantained librairies (I don't have enough time to mantain the code), and, why not, learn some new things...
i like CI for php.