Remove redundant __nonzero__ methods
From https://docs.python.org/2/reference/datamodel.html#specialnames :
When this method is not defined, __len__() is called, if it is
defined, and the object is considered true if its result is nonzero.
Also helpful for an eventual migration to py3k, as __nonzero__ has been
replaced with __bool__, which also defaults to looking at __len__ if
undefined.
# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from warnings import warn
from logilab.common.deprecation import class_moved
warn('[3.15] moved to logilab.common.registry', DeprecationWarning, stacklevel=2)
from logilab.common.registry import *
VRegistry = class_moved(RegistryStore, old_name='VRegistry', message='[3.15] VRegistry moved to logilab.common.registry as RegistryStore')