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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_object_from_classbased_instance( instance, queryset, request, *args, **kwargs):
 """ Get object from an instance of classbased generic view Parameters instance : instance An instance of classbased generic view queryset : instance A queryset instance request : instance A instance of HttpRequest Returns ------- instance An instance of model object or None """

    from django.views.generic.edit import BaseCreateView
    # initialize request, args, kwargs of classbased_instance
    # most of methods of classbased view assumed these attributes
    # but these attributes is initialized in ``dispatch`` method.
    instance.request = request
    instance.args = args
    instance.kwargs = kwargs

    # get queryset from class if ``queryset_or_model`` is not specified
    if hasattr(instance, 'get_queryset') and not queryset:
        queryset = instance.get_queryset()
    elif hasattr(instance, 'queryset') and not queryset:
        queryset = instance.queryset
    elif hasattr(instance, 'model') and not queryset:
        queryset = instance.model._default_manager.all()

    # get object
    if hasattr(instance, 'get_object'):
        try:
            obj = instance.get_object(queryset)
        except AttributeError as e:
            # CreateView has ``get_object`` method but CreateView
            # should not have any object before thus simply set
            # None
            if isinstance(instance, BaseCreateView):
                obj = None
            else:
                raise e
    elif hasattr(instance, 'object'):
        obj = instance.object
    else:
        obj = None
    return obj