Dropped import during merge

Author: timsaucer

python/datafusion/dataframe.py

@@ -21,7 +21,7 @@
 
 from __future__ import annotations
 
-from typing import Any, Iterable, List, TYPE_CHECKING
+from typing import Any, Iterable, List, Literal, TYPE_CHECKING
 from datafusion.record_batch import RecordBatchStream
 from typing_extensions import deprecated
 from datafusion.plan import LogicalPlan, ExecutionPlan