Github user HyukjinKwon commented on a diff in the pull request:

    https://github.com/apache/spark/pull/20400#discussion_r165254380
  
    --- Diff: python/pyspark/sql/window.py ---
    @@ -129,11 +131,34 @@ def rangeBetween(start, end):
             :param end: boundary end, inclusive.
                         The frame is unbounded if this is 
``Window.unboundedFollowing``, or
                         any value greater than or equal to min(sys.maxsize, 
9223372036854775807).
    +
    +        >>> from pyspark.sql import functions as F, SparkSession, Window
    +        >>> spark = SparkSession.builder.getOrCreate()
    +        >>> df = spark.createDataFrame([(1, "a"), (1, "a"), (2, "a"), (1, 
"b"), (2, "b"),
    +        ... (3, "b")], ["id", "category"])
    --- End diff --
    
    I think we better format it as .. 
    
    ```python
    >>> df = spark.createDataFrame(
    ...     [(1, "a"), (1, "a"), (2, "a"), (1, "b"), (2, "b"), (3, "b")], 
["id", "category"])
    ```


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