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tensor_converter.py
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tensor_converter.py
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# Copyright 2017 Artem Artemev @awav
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from .. import misc
from .errors import GPflowError
from .parentable import Parentable
class TensorConverter: # pylint: disable=R0903
__tensor_mode__ = '_tensor_mode'
@classmethod
def tensor_mode(cls, obj):
if not isinstance(obj, Parentable):
raise ValueError('Tensor mode works only with parentable objects.')
while True:
mode = misc.get_attribute(obj, cls.__tensor_mode__, allow_fail=True)
if mode is not None:
return mode
parent = misc.get_attribute(obj, '_parent')
if parent is None:
break
if parent is obj:
raise GPflowError('Inconsistency in parentable object found.')
obj = parent
return False