ctypes bindings for LevelDB

The existing three LevelDB interfaces (py-leveldb, cpy-leveldb, plyvel) use the Python C API and compile Python modules that work with LevelDB's C++ interface. This Python module simply uses the ctypes library to LevelDB's C interface - making it more portable across Python implementations and easier to install and distribute.

leveldb-py:

• supports get/put/delete (with standard read/write options)
• supports bloom filters
• supports leveldb LRU cache
• allows for manual or automatic database closing (compare with py-leveldb)
• provides write batches
• provides iterators (full control of leveldb iteration, with additional idiomatic python iterator support)
• provides prefix-based iteration (returns iterators that work as if all keys with a shared prefix had the prefix stripped and were dumped into their own database)
• provides scoped sub-databases (presents a new database wrapper backed by an existing database with all keys prefixed by some prefix)
• provides range iterators (for idioms like give me all keys between start and end)
• provides an in-memory db implementation (for faster unit tests)
• supports snapshots
• fits in one file
• requires no compilation

Sample Usage

import leveldb

db = leveldb.DB("/path/to/db", create_if_missing=True)
db.put("key", "value")
print db.get("key")

for key, value in db:
  print key, value