exceptions.py•1.44 kB
# Copyright 2025 Google LLC.
#
# 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.
class _ErrorStrMixin:
"""A mixin to provide a descriptive __str__ representation for exceptions."""
def __str__(self) -> str:
"""Returns a string representation of the exception."""
message = self.args[0] if self.args else ""
# Prepend the class name to the message for clarity.
return f"{self.__class__.__name__}: {message}"
class NoDataFoundError(_ErrorStrMixin, LookupError):
"""Raised when a query returns no data for a valid input."""
class DataLookupError(_ErrorStrMixin, LookupError):
"""Raised when there is an error during a data lookup operation."""
class InvalidDateFormatError(_ErrorStrMixin, ValueError):
"""Raised when a date string has an invalid format."""
class InvalidDateRangeError(_ErrorStrMixin, ValueError):
"""Raised when a start date is later than end date for a date range."""