from typing import Any, Optional, Tuple from django.db.migrations.migration import Migration from django.db.utils import DatabaseError class AmbiguityError(Exception): ... class BadMigrationError(Exception): ... class CircularDependencyError(Exception): ... class InconsistentMigrationHistory(Exception): ... class InvalidBasesError(ValueError): ... class IrreversibleError(RuntimeError): ... class NodeNotFoundError(LookupError): message: str = ... origin: None = ... node: Tuple[str, str] = ... def __init__( self, message: str, node: Tuple[str, str], origin: Optional[Migration] = ..., ) -> None: ... class MigrationSchemaMissing(DatabaseError): ... class InvalidMigrationPlan(ValueError): ...