tensorflow/tensorflow/python/tf2.py at develop · NervanaSystems/tensorflow · GitHub

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# 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.

# ==============================================================================

"""Tools to help with the TensorFlow 2.0 transition.

This module is meant for TensorFlow internal implementation, not for users of

the TensorFlow library. For that see tf.compat instead.

"""

from __future__ import absolute_import

from __future__ import division

from __future__ import print_function

import os

_force_enable = False

def enable():

"""Enables v2 behaviors."""

global _force_enable

_force_enable = True

def disable():

"""Disables v2 behaviors (TF2_BEHAVIOR env variable is still respected)."""

global _force_enable

_force_enable = False

def enabled():

"""Returns True iff TensorFlow 2.0 behavior should be enabled."""

return _force_enable or os.getenv("TF2_BEHAVIOR", "0") != "0"

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