From a48061a5804418a63aac24bfce444fd555e3ffe7 Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Tue, 10 Jan 1995 00:31:14 +0000 Subject: shelve.py: database of persistent objects, on top of pickle.py and anydbm.py pickle.py: new low-level persistency module (used to be called flatten) dbmac.py: stupid dbm clone for the Mac anydbm.py: generic dbm interface (should be extended to support gdbm) --- Lib/shelve.py | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Lib/shelve.py (limited to 'Lib/shelve.py') diff --git a/Lib/shelve.py b/Lib/shelve.py new file mode 100644 index 0000000000..b90e6412ec --- /dev/null +++ b/Lib/shelve.py @@ -0,0 +1,43 @@ +"""Manage shelves of pickled objects.""" + +import pickle +import StringIO + +class Shelf: + + def __init__(self, dict): + self.dict = dict + + def keys(self): + return self.dict.keys() + + def __len__(self): + return self.dict.len() + + def has_key(self, key): + return self.dict.has_key(key) + + def __getitem__(self, key): + return pickle.Unpickler(StringIO.StringIO(self.dict[key])).load() + + def __setitem__(self, key, value): + f = StringIO.StringIO() + p = pickle.Pickler(f) + p.dump(value) + self.dict[key] = f.getvalue() + + def __delitem__(self, key): + del self.dict[key] + + def close(self): + self.db.close() + self.db = None + +class DbShelf(Shelf): + + def __init__(self, file): + import anydbm + Shelf.__init__(self, anydbm.open(file)) + +def open(file): + return DbShelf(file) -- cgit v1.2.1