# coding=utf-8

# Copyright 2020 The TF-Agents Authors.

#

# 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

#

# https://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.

"""Utils to export metrics."""

from absl import logging

def export_metrics(step, metrics, loss_info=None):

"""Exports the metrics and loss information to logging.info.

Args:

step: Integer denoting the round at which we log the metrics.

metrics: List of `TF metrics` to log.

loss_info: An optional instance of `LossInfo` whose value is logged.

"""

def logging_at_step_fn(name, value):

logging_msg = f'[step={step}] {name} = {value}.'

logging.info(logging_msg)

for metric in metrics:

logging_at_step_fn(metric.name, metric.result())

if loss_info is not None:

logging_at_step_fn('loss', loss_info.loss)