Simple dictionary migrations for Python
winter.py is a small library designed to handle the problem of migrating data in document-store databases like CouchDB or MongoDB. It handles field additions, deletions, renames, and arbitrary modifications to field values. It operates solely on Python dictionaries.
Important: winter.py is completely standalone. The source file
includes the license, documentation, a test suite, and
distutils installer. It has no dependencies, and works
in Python 2.6+ and Python 3.0+.
winter.py is a totally standalone module, so you can pick it up and drop it wherever you want, and it'll import just fine. If you're in the mood, you can also install it as you would any other Python package by the magic of good old distutils. Just do
python winter.py installWhich is slightly unconventional, I know, but it lets me keep this down to a single source file.
Documentation lives at the top of the source file. The test suite is also pretty straightforward, so give that a look over if you're looking for more guidance.
The MIT License:
Copyright (c) 2012 Patrick Stein
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.