Query related to matplotlib

[srinivasan srinivas]

I would like to draw a chart which takes 'dates' in x axes and some values in y axes.  
I would like to draw a simple chart using matplotlib. Can someone tell me which submodule i could use for this purpose? The module has to support in the way that i can draw more than one set can be passed to Y axes. So it will generate more than one line.

Thanks,
Srini



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