66 lines
2.0 KiB
Python
66 lines
2.0 KiB
Python
|
# Copyright 2020 Huawei Technologies Co., Ltd
|
||
|
|
#
|
||
|
|
# 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.
|
||
|
|
# ============================================================================
|
||
|
|
"""Summary reader."""
|
||
|
|
import struct
|
||
|
|
|
||
|
|
import mindspore.train.summary_pb2 as summary_pb2
|
||
|
|
|
||
|
|
_HEADER_SIZE = 8
|
||
|
|
_HEADER_CRC_SIZE = 4
|
||
|
|
_DATA_CRC_SIZE = 4
|
||
|
|
|
||
|
|
|
||
|
|
class _EndOfSummaryFileException(Exception):
|
||
|
|
"""Indicates the summary file is exhausted."""
|
||
|
|
|
||
|
|
|
||
|
|
class SummaryReader:
|
||
|
|
"""
|
||
|
|
Basic summary read function.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
canonical_file_path (str): The canonical summary file path.
|
||
|
|
ignore_version_event (bool): Whether ignore the version event at the beginning of summary file.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, canonical_file_path, ignore_version_event=True):
|
||
|
|
self._file_path = canonical_file_path
|
||
|
|
self._ignore_version_event = ignore_version_event
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
self._file_handler = open(self._file_path, "rb")
|
||
|
|
if self._ignore_version_event:
|
||
|
|
self.read_event()
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __exit__(self, *unused_args):
|
||
|
|
self._file_handler.close()
|
||
|
|
return False
|
||
|
|
|
||
|
|
def read_event(self):
|
||
|
|
"""Read next event."""
|
||
|
|
file_handler = self._file_handler
|
||
|
|
header = file_handler.read(_HEADER_SIZE)
|
||
|
|
data_len = struct.unpack('Q', header)[0]
|
||
|
|
# Ignore crc check.
|
||
|
|
file_handler.read(_HEADER_CRC_SIZE)
|
||
|
|
|
||
|
|
event_str = file_handler.read(data_len)
|
||
|
|
# Ignore crc check.
|
||
|
|
file_handler.read(_DATA_CRC_SIZE)
|
||
|
|
summary_event = summary_pb2.Event.FromString(event_str)
|
||
|
|
|
||
|
|
return summary_event
|