Box Object

box_object.py

from wrapt import ObjectProxy
from box import Box


class BoxObject(ObjectProxy):
        """
        Wrapper for any Python object with a Box as __dict__.
        
        Simple Usage:
        import requests
        url = 'https://raw.githubusercontent.com/cdgriffith/Box/master/box.py'
        session = BoxObject(requests.Session())
        session.source_code = session.get(url).text
        
        :param wrapped: Wrapped Object.
        :param box_class: Custom internal Box class
        :param args: Arguments to fill Box
        :param kwargs: Keyword arguments to fill Box
        """

        def __init__(self, wrapped=None, *args, **kwargs):
            """Initialize Box Object with __dict__ as a Box."""
            super(BoxObject, self).__init__(wrapped)
            box_class = kwargs.pop('box_class', Box)
            try:
                base_dict = super(BoxObject, self).__getattr__('__dict__')
                if args:
                    raise TypeError('Cannot pass dictionary arguments when '
                                    'internal object has __dict__ attributes. '
                                    'Pass arguments by keyword instead.')
                box = box_class(base_dict, **kwargs)
            except AttributeError:
                box = box_class(*args, **kwargs)
            super(BoxObject, self).__setattr__('__dict__', box)

        def __call__(self, *args, **kwargs):
            """Call Method for Callable Objects."""
            return self.__wrapped__(*args, **kwargs)

        def __getattr__(self, name):
            """Get Attribute from Wrapped Object or from Box."""
            try:
                return super(BoxObject, self).__getattr__(name)
            except AttributeError as error:
                try:
                    return self.__dict__[name]
                except KeyError:
                    raise error

        def __setattr__(self, name, value):
            """Set Attribute in Wrapped Object or Box."""
            if name == '__dict__':
                raise TypeError('cannot set __dict__')
            elif hasattr(self.__wrapped__, name):
                setattr(self.__wrapped__, name, value)
            else:
                self.__dict__[name] = value

        def __delattr__(self, name):
            """Delete Attribute in Wrapped Object or Box."""
            if name == '__dict__':
                super(BoxObject, self).__setattr__(
                    '__dict__',
                    getattr(self.__wrapped__, '__dict__', {})
                )
            else:
                try:
                    delattr(self.__wrapped__, name)
                except AttributeError as error:
                    try:
                        del self.__dict__[name]
                    except KeyError:
                        raise error