python module for interactive web charts

[Moosebumps]

Is there anything that is made to generate web pages which have charts
similar to the yahoo finance stock charts?  Not looking to graph stocks
specifically, but anything.  I like how you can zoom on each axis, and maybe
click to see numerical values and such.

If there isn't anything in Python, what do people typically use for that
kind of stuff, or is it all hand-rolled?

thanks,
MB