web chart with hover events

I am after a library with a Python interface to render nice looking charts with hover events for each point.

ChartDirector does what I want, but I would prefer an open source solution. OpenFlashChart looks good, although ideally I would want a non-Flash solution.

开发者_开发知识库Any other contenders?

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Not strictly Python, but you may want to look at Flot. (assuming by web chart you mean those that are to be embedded on web pages)