<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def restore(self):
 """ Set the values of whatever attributes are recoverable from the pickle file. Populate the attributes (the __dict__) of the EgStore object from the attributes (the __dict__) of the pickled object. If the pickled object has attributes that have been initialized in the EgStore object, then those attributes of the EgStore object will be replaced by the values of the corresponding attributes in the pickled object. If the pickled object is missing some attributes that have been initialized in the EgStore object, then those attributes of the EgStore object will retain the values that they were initialized with. If the pickled object has some attributes that were not initialized in the EgStore object, then those attributes will be ignored. IN SUMMARY: After the recover() operation, the EgStore object will have all, and only, the attributes that it had when it was initialized. Where possible, those attributes will have values recovered from the pickled object. """

        if not os.path.exists(self.filename):
            return self
        if not os.path.isfile(self.filename):
            return self

        try:
            with open(self.filename, "rb") as f:
                unpickledObject = pickle.load(f)

            for key in list(self.__dict__.keys()):
                default = self.__dict__[key]
                self.__dict__[key] = unpickledObject.__dict__.get(key, default)
        except:
            pass

        return self