pyspark.sql.DataFrame.head

DataFrame.head(n=None)

Returns the first n rows.

New in version 1.3.0.

Parameters:

nint, optional

default 1. Number of rows to return.

Returns:

If n is greater than 1, return a list of Row.

If n is 1, return a single Row.

Notes

This method should only be used if the resulting array is expected to be small, as all the data is loaded into the driver’s memory.

Examples

>>> df.head()
Row(age=2, name='Alice')
>>> df.head(1)
[Row(age=2, name='Alice')]

pyspark.sql.DataFrame.groupBy pyspark.sql.DataFrame.hint