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Exceptions Guide

Layout

Exceptions are grouped by failure domain:

  • exceptions/common: validation, configuration, not found, and conflict.
  • exceptions/security: authentication and authorization.
  • exceptions/integration: APIs, queues, Redis, rate limits, timeouts, and dependencies.
  • exceptions/persistence: transactions, repositories, queries, and outbox.
  • exceptions/reliability: retry and idempotency failures.
  • exceptions/web: middleware and web boundary failures.

Import Style

Application code may use the grouped path or the root export:

from python_core.exceptions import ValidationError
from python_core.exceptions.persistence.transaction_error import TransactionError