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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision ba0b6aeda605bec73c90f93fc05dd1cbc4efa9d3 authored by cvs2svn on 12 January 1995, 12:42:09 UTC, committed by cvs2svn on 12 January 1995, 12:42:09 UTC 
This commit was manufactured by cvs2svn to create tag 'r12beta1'.
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Tip revision: ba0b6aeda605bec73c90f93fc05dd1cbc4efa9d3 authored by cvs2svn on 12 January 1995, 12:42:09 UTC
This commit was manufactured by cvs2svn to create tag 'r12beta1'.
Tip revision: ba0b6ae
shelve.py 
"""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)
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