[GitHub] [spark] ueshin commented on a diff in pull request #36893: [SPARK-39494][PYTHON] Support `createDataFrame` from a list of scalars

[GitBox <gi...@apache.org>]

ueshin commented on code in PR #36893:
URL: https://github.com/apache/spark/pull/36893#discussion_r899648682


##########
python/pyspark/sql/session.py:
##########
@@ -1024,7 +1024,18 @@ def prepare(obj: Any) -> Any:
         if isinstance(data, RDD):
             rdd, struct = self._createFromRDD(data.map(prepare), schema, samplingRatio)
         else:
-            rdd, struct = self._createFromLocal(map(prepare, data), schema)
+            if isinstance(data, list):
+                # Wrap each element with a tuple if there is any scalar in the list
+                has_scalar = False
+                for x in data:
+                    if isinstance(x, str) or not hasattr(x, "__len__"):  # Scalar
+                        has_scalar = True
+                        break

Review Comment:
   How about:
   ```py
   has_scalar = any(isinstance(x, str) or not hasattr(x, "__len__") for x in data)
   ```
   ?



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