Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/22349#discussion_r216120943
--- Diff: python/pyspark/ml/image.py ---
@@ -30,6 +30,7 @@
from pyspark import SparkContext
from pyspark.sql.types import Row, _create_row, _parse_datatype_json_string
from pyspark.sql import DataFrame, SparkSession
+import warnings
--- End diff --
Technically builtin package should be ordered above per PEP 8. I wonder why
this is not caught.
```
import sys
import warnings
import numpy as np
from pyspark import SparkContext
from pyspark.sql.types import Row, _create_row, _parse_datatype_json_string
from pyspark.sql import DataFrame, SparkSession
```
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