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Test py #37455

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3e880c0
[SPARK-40010][PYTHON][DOCS] Make pyspark.sql.window examples self-con…
dcoliversun Aug 9, 2022
3462330
add spark define
dcoliversun Aug 9, 2022
a1f9b54
config master and appName for sparkSession
dcoliversun Aug 9, 2022
12b6515
SparkSession initialized in test method
dcoliversun Aug 9, 2022
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47 changes: 36 additions & 11 deletions python/pyspark/sql/window.py
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Original file line number Diff line number Diff line change
Expand Up @@ -128,11 +128,23 @@ def rowsBetween(start: int, end: int) -> "WindowSpec":
--------
>>> from pyspark.sql import Window
>>> from pyspark.sql import functions as func
>>> from pyspark.sql import SQLContext
>>> sc = SparkContext.getOrCreate()
>>> sqlContext = SQLContext(sc)
>>> tup = [(1, "a"), (1, "a"), (2, "a"), (1, "b"), (2, "b"), (3, "b")]
>>> df = sqlContext.createDataFrame(tup, ["id", "category"])
>>> df = spark.createDataFrame(
... [(1, "a"), (1, "a"), (2, "a"), (1, "b"), (2, "b"), (3, "b")], ["id", "category"])
>>> df.show()
+---+--------+
| id|category|
+---+--------+
| 1| a|
| 1| a|
| 2| a|
| 1| b|
| 2| b|
| 3| b|
+---+--------+

Calculate sum of ``id`` in the range from currentRow to currentRow + 1
in partition ``category``

>>> window = Window.partitionBy("category").orderBy("id").rowsBetween(Window.currentRow, 1)
>>> df.withColumn("sum", func.sum("id").over(window)).sort("id", "category", "sum").show()
+---+--------+---+
Expand Down Expand Up @@ -196,11 +208,23 @@ def rangeBetween(start: int, end: int) -> "WindowSpec":
--------
>>> from pyspark.sql import Window
>>> from pyspark.sql import functions as func
>>> from pyspark.sql import SQLContext
>>> sc = SparkContext.getOrCreate()
>>> sqlContext = SQLContext(sc)
>>> tup = [(1, "a"), (1, "a"), (2, "a"), (1, "b"), (2, "b"), (3, "b")]
>>> df = sqlContext.createDataFrame(tup, ["id", "category"])
>>> df = spark.createDataFrame(
... [(1, "a"), (1, "a"), (2, "a"), (1, "b"), (2, "b"), (3, "b")], ["id", "category"])
>>> df.show()
+---+--------+
| id|category|
+---+--------+
| 1| a|
| 1| a|
| 2| a|
| 1| b|
| 2| b|
| 3| b|
+---+--------+

Calculate sum of ``id`` in the range from ``id`` of currentRow to ``id`` of currentRow + 1
in partition ``category``

>>> window = Window.partitionBy("category").orderBy("id").rangeBetween(Window.currentRow, 1)
>>> df.withColumn("sum", func.sum("id").over(window)).sort("id", "category").show()
+---+--------+---+
Expand Down Expand Up @@ -329,9 +353,10 @@ def rangeBetween(self, start: int, end: int) -> "WindowSpec":

def _test() -> None:
import doctest
from pyspark.sql import SparkSession
import pyspark.sql.window

SparkContext("local[4]", "PythonTest")
spark = SparkSession.builder.master("local[4]").appName("sql.window tests").getOrCreate()
globs = pyspark.sql.window.__dict__.copy()
(failure_count, test_count) = doctest.testmod(
pyspark.sql.window, globs=globs, optionflags=doctest.NORMALIZE_WHITESPACE
Expand Down