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Alex Rivera
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List Comprehension for me seems to be like the opaque block of granite that regular expressions are for me. I need pointers. Say, I have a 2D list: li = [[0,1,2],[3,4,5],[6,7,8]] I would like to merge this either into one long list li2 = [0,1,2,3,4,5,6,7,8] or into a string with separators: s = "0,1,2,3,4,5,6,7,8" Really, I'd like to know how to do both.
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