Python usage notes - iterable stuff
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Various things have their own pages, see Category:Python. Some of the pages that collect various practical notes include:
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Sorting
| This article/section is a stub — probably a pile of half-sorted notes, is not well-checked so may have incorrect bits. (Feel free to ignore, fix, or tell me) |
- sorted()for a sorted copy
- object.sort()for in-place
key
The key parameter should be a callable that fetches the value to sort on from an object. This allows:
- normalization, e.g. case-insensitive sort via:
key=lambda x: x.lower()
- sorting on multiple aspects of things, when you return a tuple, for example:
- Empty strings last too via:
key=lambda x: (x=='', x.lower())
When you're fetching from lists, dicts, or attibutes, consider that operator.attrgetter and operator.itemgetter can go a long way, e.g. allowing:
dictlist.sort(key=itemgetter('artist','title'))
See also:
