Github user BryanCutler commented on the issue: https://github.com/apache/spark/pull/20213 repro to get the warning (this is the non-Arrow code path) ```python import numpy as np import pandas as pd pdf = pd.DataFrame(np.random.rand(100, 2)) df = spark.createDataFrame(pdf[:10]) ''' /home/bryan/git/spark/python/pyspark/sql/session.py:476: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy pdf[column] = s ''' ```
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