@contextfunction
def permission_block(context, object):
    "Block with objects permissions"
    request = context['request']
    response_format = 'html'
    if 'response_format' in context:
        response_format = context['response_format']

    response_format_tags = response_format
    if 'response_format_tags' in context:
        response_format_tags = context['response_format_tags']

    if 'permission' in request.GET:
        if request.user.profile.has_permission(object, mode='w'):
            if request.POST:
                if 'cancel' is not request.POST:
                    request.redirect = request.path
                    return Markup(render_to_string('core/tags/permission_block',
                                                   {'object': object,
                                                       'path': request.path},
                                                   context_instance=RequestContext(
                                                       request),
                                                   response_format=response_format))
                form = PermissionForm(request.POST, instance=object)
                if form.is_valid():
                    form.save()
                    request.redirect = request.path
                    return Markup(render_to_string('core/tags/permission_block',
                                                   {'object': object,
                                                       'path': request.path},
                                                   context_instance=RequestContext(
                                                       request),
                                                   response_format=response_format))
            else:
                form = PermissionForm(instance=object)

            context = {'object': object, 'path': request.path, 'form': form}

            if 'ajax' in response_format_tags:
                context = converter.preprocess_context(context)

            return Markup(render_to_string('core/tags/permission_block_edit',
                                           context,
                                           context_instance=RequestContext(
                                               request),
                                           response_format=response_format))

    return Markup(render_to_string('core/tags/permission_block',
                                   {'object': object, 'path': request.path},
                                   context_instance=RequestContext(request),
                                   response_format=response_format))
dataset/ETHPy150Open treeio/treeio/treeio/core/templatetags/object.py/permission_block/operator `in` -> `is not`