dropna

Returns a new DataFrame omitting rows with null or NaN values. DataFrame.dropna and DataFrameNaFunctions.drop are aliases of each other.

Syntax

dropna(how: str = "any", thresh: Optional[int] = None, subset: Optional[Union[str, Tuple[str, ...], List[str]]] = None)

Parameters

Parameter	Type	Description
how	str, optional, default 'any'	the values that can be 'any' or 'all'. If 'any', drop a row if it contains any nulls. If 'all', drop a row only if all its values are null.
thresh	int, optional, default None	If specified, drop rows that have less than thresh non-null values. This overwrites the how parameter.
subset	str, tuple or list, optional	optional list of column names to consider.

Returns

DataFrame: DataFrame with null only rows excluded.

Examples

from pyspark.sql import Row
df = spark.createDataFrame([
    Row(age=10, height=80.0, name="Alice"),
    Row(age=5, height=float("nan"), name="Bob"),
    Row(age=None, height=None, name="Tom"),
    Row(age=None, height=float("nan"), name=None),
])

df.na.drop().show()
# +---+------+-----+
# |age|height| name|
# +---+------+-----+
# | 10|  80.0|Alice|
# +---+------+-----+

df.na.drop(how='all').show()
# +----+------+-----+
# | age|height| name|
# +----+------+-----+
# |  10|  80.0|Alice|
# |   5|   NaN|  Bob|
# |NULL|  NULL|  Tom|
# +----+------+-----+

df.na.drop(thresh=2).show()
# +---+------+-----+
# |age|height| name|
# +---+------+-----+
# | 10|  80.0|Alice|
# |  5|   NaN|  Bob|
# +---+------+-----+