Takuya Ueshin created SPARK-53939:
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Summary: Use batch.num_columns instead of len(batch.columns).
Key: SPARK-53939
URL: https://issues.apache.org/jira/browse/SPARK-53939
Project: Spark
Issue Type: Improvement
Components: PySpark
Affects Versions: 4.1.0
Reporter: Takuya Ueshin
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