Looking for simple python chart library

I'm looking for simple chart library. I need it to draw stock quote and portfolio benchmarking charts.

I'm trying now pycha (python charts). It's simple but ready for most common applications. One drawback- I'm unable to setup needed cairo library on testing system, yet.

I will try to made it, but maybe there is another solution.

Do you know any python chart drawing library with less dependencies?

Update:
It is still one of the simplest and best chart utilities. I'm also using JavaScript generated charts in web browser.