Nóta
Aðgangur að þessari síðu krefst heimildar. Þú getur prófað aðskrá þig inn eða breyta skráasöfnum.
Aðgangur að þessari síðu krefst heimildar. Þú getur prófað að breyta skráasöfnum.
Returns the last num rows as a list of Row.
Syntax
tail(num: int)
Parameters
| Parameter | Type | Description |
|---|---|---|
num |
int | Number of records to return. Will return this number of records or all records if the DataFrame contains less than this number of records. |
Returns
list: List of rows.
Notes
Running tail requires moving data into the application's driver process, and doing so with a very large num can crash the driver process with OutOfMemoryError.
Examples
df = spark.createDataFrame(
[(14, "Tom"), (23, "Alice"), (16, "Bob")], ["age", "name"])
df.tail(2)
# [Row(age=23, name='Alice'), Row(age=16, name='Bob')]