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PySpark DataFrame | tail method
schedule Aug 12, 2023
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PySpark DataFrame's tail(~) method returns the last num number of rows as a list of Row objects.
WARNING
This method involves transferring data to the application's driver process, and therefore if the specified num is too large, then an OutOfMemoryError will occur.
Parameters
1. num | int
The number of rows to return.
Return Value
A list of Row objects.
Examples
Consider the following PySpark DataFrame:
columns = ["name", "age"]data = [("Alex", 15), ("Bob", 20), ("Cathy", 25)]
+-----+---+| name|age|+-----+---+| Alex| 15|| Bob| 20||Cathy| 25|+-----+---+
Getting the last row of a PySpark DataFrame
To get the last row:
df.tail(num=1)
[Row(name='Cathy', age=25)]
Getting the last n rows of a PySpark DataFrame
To get the last two rows:
df.tail(num=2)
[Row(name='Bob', age=20), Row(name='Cathy', age=25)]
Published by Isshin Inada
Edited by 0 others
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Official PySpark Documentation
https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.sql.DataFrame.tail.html
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