fix

Author: zhengruifeng

python/pyspark/sql/connect/tvf.py

@@ -121,8 +121,13 @@ def _fn(self, name: str, *args: "Column") -> "DataFrame":
 
 def _test() -> None:
     import os
-    import doctest
     import sys
+
+    if os.environ.get("PYTHON_GIL", "?") == "0":
+        print("Not supported in no-GIL mode", file=sys.stderr)
+        sys.exit(0)
+
+    import doctest
     from pyspark.sql import SparkSession as PySparkSession
     import pyspark.sql.connect.tvf