diff options
Diffstat (limited to 'lib/sqlalchemy/sql/base.py')
| -rw-r--r-- | lib/sqlalchemy/sql/base.py | 27 |
1 files changed, 6 insertions, 21 deletions
diff --git a/lib/sqlalchemy/sql/base.py b/lib/sqlalchemy/sql/base.py index 4165751ca..b5a20830d 100644 --- a/lib/sqlalchemy/sql/base.py +++ b/lib/sqlalchemy/sql/base.py @@ -30,6 +30,12 @@ from .. import util from ..util import HasMemoized from ..util import hybridmethod +try: + from sqlalchemy.cyextension.util import prefix_anon_map # noqa +except ImportError: + from ._py_util import prefix_anon_map # noqa + + coercions = None elements = None type_api = None @@ -1012,27 +1018,6 @@ class Executable(roles.StatementRole, Generative): return self._execution_options -class prefix_anon_map(dict): - """A map that creates new keys for missing key access. - - Considers keys of the form "<ident> <name>" to produce - new symbols "<name>_<index>", where "index" is an incrementing integer - corresponding to <name>. - - Inlines the approach taken by :class:`sqlalchemy.util.PopulateDict` which - is otherwise usually used for this type of operation. - - """ - - def __missing__(self, key): - (ident, derived) = key.split(" ", 1) - anonymous_counter = self.get(derived, 1) - self[derived] = anonymous_counter + 1 - value = derived + "_" + str(anonymous_counter) - self[key] = value - return value - - class SchemaEventTarget: """Base class for elements that are the targets of :class:`.DDLEvents` events. |