Source code for mrmustard.utils.filters
# Copyright 2023 Xanadu Quantum Technologies Inc.
# 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.
"""
This module contains a class to filter undesired warnings.
"""
import logging
class WarningFilters(logging.Filter):
r"""
A custom logging filter to selectively allow log records based on specific warnings.
Args:
warnings: A list of warning messages that must be filtered.
"""
def __init__(self, warnings: list[str]):
super().__init__()
self.warnings = warnings
def filter(self, record) -> bool:
r"""
Determine if the log record should be allowed based on specific warnings.
Args:
record: The ``LogRecord`` to be filtered.
Returns:
``True`` if the log record should be allowed, ``False`` otherwise.
"""
return any(w in record.getMessage() for w in self.warnings)
# ComplexWarning filter for tensorflow.
msg = "WARNING:tensorflow:You are casting an input of type complex128 to an incompatible dtype float64."
msg += " This will discard the imaginary part and may not be what you intended."
complex_warninig_filter = WarningFilters([msg])
[docs]
def add_complex_warning_filter():
r"""
Adds the filter for tensorflow's ComplexWarning, or does nothing if the filter is already in place.
"""
logger = logging.getLogger("tensorflow")
logger.addFilter(complex_warninig_filter)
def remove_complex_warning_filter():
r"""
Removes the filter for tensorflow's ComplexWarning, or does nothing if no such filter is present.
"""
logger = logging.getLogger("tensorflow")
logger.removeFilter(complex_warninig_filter)
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