zhengruifeng commented on code in PR #36893:
URL: https://github.com/apache/spark/pull/36893#discussion_r900708474
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python/pyspark/sql/session.py:
##########
@@ -1024,7 +1024,14 @@ def prepare(obj: Any) -> Any:
if isinstance(data, RDD):
rdd, struct = self._createFromRDD(data.map(prepare), schema,
samplingRatio)
else:
Review Comment:
```suggestion
else if isinstance(data, list):
# Wrap each element with a tuple if there is any scalar in the
list
has_scalar = any(isinstance(x, str) or not hasattr(x, "__len__")
for x in data)
converted_data = [(x,) for x in data] if has_scalar else data
rdd, struct = self._createFromLocal(map(prepare,
converted_data), schema)
else:
rdd, struct = self._createFromLocal(map(prepare, data), schema)
```
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