| |
| """Utilities for working with data structures like lists, dicts and tuples. |
| """ |
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| def uniq_stable(elems): |
| """uniq_stable(elems) -> list |
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| Return from an iterable, a list of all the unique elements in the input, |
| but maintaining the order in which they first appear. |
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| Note: All elements in the input must be hashable for this routine |
| to work, as it internally uses a set for efficiency reasons. |
| """ |
| seen = set() |
| return [x for x in elems if x not in seen and not seen.add(x)] |
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| def chop(seq, size): |
| """Chop a sequence into chunks of the given size.""" |
| return [seq[i:i+size] for i in range(0,len(seq),size)] |
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