How to use the zenpy.lib.proxy.ProxyDict function in zenpy

def setUp(self):
        self.test_object = Ticket(comments=ProxyDict(dict(comment=Comment(),
                                                          list=[1, 3, 4],
                                                          dict={1: 2, 3: 4})))
        self.attribute_name = 'comments'
        self.proxy_dict = getattr(self.test_object, self.attribute_name)
        self.proxy_dict._clean_dirty()
        self.test_object._clean_dirty()

def test_proxy_list_wraps_dict(self):
        some_dict = self.proxy_dict['dict']
        self.assertIsInstance(some_dict, ProxyDict)

def object_from_json(self, object_type, object_json, parent=None):
        """
        Given a blob of JSON representing a Zenpy object, recursively deserialize it and
         any nested objects it contains. This method also adds the deserialized object
         to the relevant cache if applicable.
        """
        if not isinstance(object_json, dict):
            return object_json
        obj = self.instantiate_object(object_type, parent)
        for key, value in object_json.items():
            if key not in self.skip_attrs:
                key, value = self._deserialize(key, obj, value)
            if isinstance(value, dict):
                value = ProxyDict(value, dirty_callback=getattr(
                    obj, '_dirty_callback', None))
            elif isinstance(value, list):
                value = ProxyList(value, dirty_callback=getattr(
                    obj, '_dirty_callback', None))
            setattr(obj, key, value)
        if hasattr(obj, '_clean_dirty'):
            obj._clean_dirty()
        self.api.cache.add(obj)
        return obj

def _wrap_element(self, element):
        """
        We want to know if an item is modified that is stored in this list. If the element is a list or dict,
        we wrap it in a ProxyList or ProxyDict, and if it is modified execute a callback that updates this
        instance. If it is a ZenpyObject, then the callback updates the parent object.
        """

        def dirty_callback():
            self._set_dirty()

        if isinstance(element, list):
            element = ProxyList(element, dirty_callback=dirty_callback)
        elif isinstance(element, dict):
            element = ProxyDict(element, dirty_callback=dirty_callback)
        # If it is a Zenpy object this will either return None or the previous wrapper.
        elif getattr(element, '_dirty_callback', self._sentinel) is not self._sentinel:
            # Don't set callback if already set.
            if not callable(element._dirty_callback):
                element._dirty_callback = dirty_callback
        return element

def _wrap_element(self, element):
        """
        We want to know if an item is modified that is stored in this dict. If the element is a list or dict,
        we wrap it in a ProxyList or ProxyDict, and if it is modified execute a callback that updates this
        instance. If it is a ZenpyObject, then the callback updates the parent object.
        """

        def dirty_callback():
            self._set_dirty()

        if isinstance(element, list):
            element = ProxyList(element, dirty_callback=dirty_callback)
        elif isinstance(element, dict):
            element = ProxyDict(element, dirty_callback=dirty_callback)
        # If it is a Zenpy object this will either return None or the previous wrapper.
        elif getattr(element, '_dirty_callback', self._sentinel) is not self._sentinel:
            # Don't set callback if already set.
            if not callable(element._dirty_callback):
                element._dirty_callback = dirty_callback
        return element

def json_encode(obj, serialize):
    """ Handle encoding complex types. """
    if hasattr(obj, 'to_dict'):
        return obj.to_dict(serialize=serialize)
    elif isinstance(obj, datetime):
        return obj.date().isoformat()
    elif isinstance(obj, date):
        return obj.isoformat()
    elif isinstance(obj, ProxyDict):
        return dict(obj)
    elif isinstance(obj, ProxyList):
        return list(obj)
    elif is_iterable_but_not_string(obj):
        return list(obj)