‡Ζ Nφ9csσdZ!y"dklZlZWn,#ej o$dklZlZnX&y'dklZWn&(ej o)dklZnX,dfd„ƒYZ`defd„ƒYZ Šdefd„ƒYZ –d d „Z d S( s£Manage shelves of pickled objects. A "shelf" is a persistent, dictionary-like object. The difference with dbm databases is that the values (not the keys!) in a shelf can be essentially arbitrary Python objects -- anything that the "pickle" module can handle. This includes most class instances, recursive data types, and objects containing lots of shared sub-objects. The keys are ordinary strings. To summarize the interface (key is a string, data is an arbitrary object): import shelve d = shelve.open(filename) # open, with (g)dbm filename -- no suffix d[key] = data # store data at key (overwrites old data if # using an existing key) data = d[key] # retrieve data at key (raise KeyError if no # such key) del d[key] # delete data stored at key (raises KeyError # if no such key) flag = d.has_key(key) # true if the key exists list = d.keys() # a list of all existing keys (slow!) d.close() # close it Dependent on the implementation, closing a persistent dictionary may or may not be necessary to flush changes to disk. (sPicklers Unpickler(sStringIOsShelfcs•,dZ13d„Z6d„Z9d„Z<d„Z?ed„ZDd„ZHd„ZNd„Z Qd „Z Xd „Z [d „Z RS( s΄Base class for shelf implementations. This is initialized with a dictionary-like object. See the module's __doc__ string for an overview of the interface. cs34||_dS(N(sdictsself(sselfsdicts#/mit/python/lib/python2.0/shelve.pys__init__3scs67|iiƒSdS(N(sselfsdictskeys(sselfs#/mit/python/lib/python2.0/shelve.pyskeys6scs9:t|iƒSdS(N(slensselfsdict(sselfs#/mit/python/lib/python2.0/shelve.pys__len__9scs<=|ii|ƒSdS(N(sselfsdictshas_keyskey(sselfskeys#/mit/python/lib/python2.0/shelve.pyshas_key<scs3?@|ii|ƒoA||SnB|SdS(N(sselfsdictshas_keyskeysdefault(sselfskeysdefaults#/mit/python/lib/python2.0/shelve.pysget?scs0DEt|i|ƒ}Ft|ƒiƒSdS(N(sStringIOsselfsdictskeysfs Unpicklersload(sselfskeysfs#/mit/python/lib/python2.0/shelve.pys __getitem__DscsHHItƒ}Jt|ƒ}K|i|ƒL|iƒ|i|