HyukjinKwon commented on code in PR #36063:
URL: https://github.com/apache/spark/pull/36063#discussion_r846944064
##########
python/pyspark/pandas/window.py:
##########
@@ -18,16 +18,19 @@
from functools import partial
from typing import Any, Callable, Generic, List, Optional
Review Comment:
```suggestion
from typing import Any, Callable, Generic, List, Optional
import numpy as np
```
##########
python/pyspark/pandas/window.py:
##########
@@ -18,16 +18,19 @@
from functools import partial
from typing import Any, Callable, Generic, List, Optional
+from pyspark import SparkContext
from pyspark.sql import Window
from pyspark.sql import functions as F
from pyspark.pandas.missing.window import (
MissingPandasLikeRolling,
MissingPandasLikeRollingGroupby,
MissingPandasLikeExpanding,
MissingPandasLikeExpandingGroupby,
+ MissingPandasLikeExponentialMoving,
)
# For running doctests and reference resolution in PyCharm.
+import numpy as np
Review Comment:
```suggestion
```
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