Special Attributes

The implementation adds a few special read-only attributes to several object types, where they are relevant:

• x.__dict__ is a dictionary of some sort used to store an object's (writable) attributes;
• x.__methods__ lists the methods of many built-in object types, e.g., [].__methods__ yields ['append', 'count', 'index', 'insert', 'remove', 'reverse', 'sort'];
• x.__members__ lists data attributes;
• x.__class__ is the class to which a class instance belongs;
• x.__bases__ is the tuple of base classes of a class object.