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# Copyright (c) 2022 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.
import logging
import os
import sys
import paddle.distributed as dist
__all__ = ['setup_logger']
logger_initialized = []
def setup_logger(name="ppdet", output=None):
"""
Initialize logger and set its verbosity level to INFO.
Args:
output (str): a file name or a directory to save log. If None, will not save log file.
If ends with ".txt" or ".log", assumed to be a file name.
Otherwise, logs will be saved to `output/log.txt`.
name (str): the root module name of this logger
Returns:
logging.Logger: a logger
"""
logger = logging.getLogger(name)
if name in logger_initialized:
return logger
logger.setLevel(logging.INFO)
logger.propagate = False
formatter = logging.Formatter(
"[%(asctime)s] %(name)s %(levelname)s: %(message)s",
datefmt="%m/%d %H:%M:%S")
# stdout logging: master only
local_rank = dist.get_rank()
if local_rank == 0:
ch = logging.StreamHandler(stream=sys.stdout)
ch.setLevel(logging.DEBUG)
ch.setFormatter(formatter)
logger.addHandler(ch)
# file logging: all workers
if output is not None:
if output.endswith(".txt") or output.endswith(".log"):
filename = output
else:
filename = os.path.join(output, "log.txt")
if local_rank > 0:
filename = filename + ".rank{}".format(local_rank)
os.makedirs(os.path.dirname(filename))
fh = logging.FileHandler(filename, mode='a')
fh.setLevel(logging.DEBUG)
fh.setFormatter(logging.Formatter())
logger.addHandler(fh)
logger_initialized.append(name)
return logger