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PaddleSpeech/deepspeech/utils/utility.py

82 lines
2.3 KiB

# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# 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.
"""Contains common utility functions."""
import distutils.util
import math
import os
from typing import List
__all__ = ['print_arguments', 'add_arguments', "log_add"]
def print_arguments(args, info=None):
"""Print argparse's arguments.
Usage:
.. code-block:: python
parser = argparse.ArgumentParser()
parser.add_argument("name", default="Jonh", type=str, help="User name.")
args = parser.parse_args()
print_arguments(args)
:param args: Input argparse.Namespace for printing.
:type args: argparse.Namespace
"""
filename = ""
if info:
filename = info["__file__"]
filename = os.path.basename(filename)
print(f"----------- {filename} Configuration Arguments -----------")
for arg, value in sorted(vars(args).items()):
print("%s: %s" % (arg, value))
print("-----------------------------------------------------------")
def add_arguments(argname, type, default, help, argparser, **kwargs):
"""Add argparse's argument.
Usage:
.. code-block:: python
parser = argparse.ArgumentParser()
add_argument("name", str, "Jonh", "User name.", parser)
args = parser.parse_args()
"""
type = distutils.util.strtobool if type == bool else type
argparser.add_argument(
"--" + argname,
default=default,
type=type,
help=help + ' Default: %(default)s.',
**kwargs)
def log_add(args: List[int]) -> float:
"""Stable log add
Args:
args (List[int]): log scores
Returns:
float: sum of log scores
"""
if all(a == -float('inf') for a in args):
return -float('inf')
a_max = max(args)
lsp = math.log(sum(math.exp(a - a_max) for a in args))
return a_max + lsp