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-rw-r--r--lib/sqlalchemy/exc.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sqlalchemy/exc.py b/lib/sqlalchemy/exc.py
index a17bb5cec..1a38fc756 100644
--- a/lib/sqlalchemy/exc.py
+++ b/lib/sqlalchemy/exc.py
@@ -644,6 +644,10 @@ class RemovedIn20Warning(SADeprecationWarning):
"Indicates the version that started raising this deprecation warning"
+class MovedIn20Warning(RemovedIn20Warning):
+ """subtype of RemovedIn20Warning to indicate an API that moved only."""
+
+
class SAPendingDeprecationWarning(PendingDeprecationWarning):
"""A similar warning as :class:`_exc.SADeprecationWarning`, this warning
is not used in modern versions of SQLAlchemy.