# Copyright 2016 James Hensman, alexggmatthews
#
# 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.


"""
A collection of wrappers and extensions for tensorflow.
"""

import os
import tensorflow as tf
from ._settings import settings


def eye(N):
    """
    An identitiy matrix
    """
    return tf.diag(tf.ones(tf.pack([N, ]), dtype=settings.dtypes.float_type))