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List Flattening Methods
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| import itertools | |
| from functools import reduce | |
| l = [[1,2,3],[4,5,6],[7],[8,9]]*99 | |
| #(1) | |
| list(itertools.chain.from_iterable(l)) | |
| #(2) | |
| reduce(lambda x,y: x+y, l) | |
| #(3) | |
| [item for sublist in l for item in sublist] | |
| #(4) | |
| sum(l, []) |
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