Question about drawing simple graph in Python?

[Mindy]

I have two lists, say:
list1 = ['s1','s2','s1','s3'...]
list2 = ['t1','t2','t3','t3'...]

I want to draw a simple graph, with 's1' points to
't1', which means drawing one line between 's1' and
's2' and an arrow pointed to 't1'. (for i in
range(len(list1), there's an edge between list1[i] and
list2[i]). So how to draw this graph in Python? I
searched on google but didn't find some easy way to
implement this. Thanks for any hints!



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Cheers
-Mindy

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