# --- datamodel.py ---


from pickle import load, dump
from os.path import join

class Loader:
        PATH = '/tmp/persistent/pso/sessions'
        def load(self, id):
                return load(file(join(self.PATH, id)))
        def save(self, id, obj):
                dump(obj, file(join(self.PATH, id), 'w'))


class Member(dict):
        IDKEY='memberId'
        LOADER = Loader()
        def load(classObj, id, loader=None):
		if loader is None:
                        loader = classObj.LOADER
		try:
			return loader.load(id)
		except IOError:
			return 	
        load = classmethod(load)
        def __init__(self, **kwa):
                dict.__init__(self, kwa)

        def save(self, loader = None):
                if loader is None:
                        loader = self.LOADER
                loader.save(self[self.IDKEY], self)

if __name__ =='__main__':
	import sys
	id = sys.argv[1]
        member = Member.load(id)
        print member
        member['name']= 'Bond'
        member.save()
        secondComming = Member.load(id)
        print secondComming