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pyorderby 1.0.0

# pyorderbyPython key functions for multi-field ordering in SQL ORDER BY fashion[![image]]Meant to be used with built-in `sorted()` *key function*.Supports also `list.sort()` doing *in-place sorting*.Implementation uses `operator.itemgetter()` + some internal helper classes to allow descending sorting order.So far this is tested and used on *lists of dictionaries*. Adding support for named tuples and others would be possible (using `operator.attrgetter()`).## Usage- SQL-like: `orderby('foo ASC, bar DESC')`- eval like: `orderby('foo−bar * 10')`- chained: `asc('foo').desc('bar')` usage- multiple fields at once: `asc('foo', 'bar')`## Examples#### `orderby()` string syntax:``` python>>> from orderby import orderby>>> import json>>> files = [... {'size': 1234, 'path': 'foo/bar.txt'},... {'size': 0, 'path': '/dev/null'},... {'size': 1234, 'path': 'foo/abc.bin'},... ]>>> print(json.dumps(sorted(files, key=orderby('size DESC, path')), indent=2))[ { "size": 1234, "path": "foo/abc.bin" }, { "size": 1234, "path": "foo/bar.txt" }, { "size": 0, "path": "/dev/null" }]```#### Chained asc() and desc() usage:``` python>>> from orderby import asc, desc>>> print(json.dumps(sorted(files, key=desc('size').asc('path')), indent=2))[ { "size": 1234, "path": "foo/abc.bin" }, { "size": 1234, "path": "foo/bar.txt" }, { "size": 0, "path": "/dev/null" }]```#### In-place sorting of a list:``` python>>> files.sort(key=desc('path'))>>> print(json.dumps(files, indent=2))[ { "size": 1234, "path": "foo/bar.txt" }, { "size": 1234, "path": "foo/abc.bin" }, { "size": 0, "path": "/dev/null" }]>>> files.sort(key=desc('size').asc('path'))>>> print(json.dumps(files, indent=2))[ { "size": 1234, "path": "foo/abc.bin" }, { "size": 1234, "path": "foo/bar.txt" }, { "size": 0, "path": "/dev/null" }]```#### Works also with [SortedContainers]:``` python>>> from sortedcontainers import SortedList>>> from orderby import desc>>> mylist = SortedList(key=desc('value'))>>> mylistSortedListWithKey([], key=<orderby.sorter.OrderBy object at 0x108f65978>, load=1000)>>> mylist.add({'value': 13})>>> mylist.add({'value': 2})>>> mylist.add({'value': 1000})>>> mylistSortedListWithKey([{'value': 1000}, {'value': 13}, {'value': 2}], key=<orderby.sorter.OrderBy object at 0x108f65978>, load=1000)``` [image]: https://img.shields.io/pypi/v/orderby.svg [![image]]: https://pypi.python.org/pypi/orderby [SortedContainers]: http://www.grantjenks.com/docs/sortedcontainers/