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Old 06-27-2011, 09:26 PM
Lars Wirzenius
Default Bug#631864: ITP: python-larch -- B-tree library for Python

Package: wnpp
Severity: wishlist
Owner: Lars Wirzenius <liw@liw.fi>

* Package name : python-larch
Version : 0.19
Upstream Author : Lars Wirzenius <liw@liw.fi>
* URL : http://liw.fi/larch/
* License : GPL
Programming Lang: Python
Description : B-tree library for Python

An implementation of a particular kind of B-tree, based on research
by Ohad Rodeh. This is the same data structure that btrfs uses, but
in a new, pure-Python implementation.
The distinctive feature of this B-tree is that a node is never (conceptually)
modified. Instead, all updates are done by copy-on-write. This makes it
easy to clone a tree, and modify only the clone, while other processes
access the original tree.
The implementation is generic and flexible, so that you may use it in
a variety of situations. For example, the tree itself does not decide
where its nodes are stored: you provide a class that does that for it.
The library contains two implementations, one for in-memory and one
for on-disk storage.

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