option (DataFrameReader)

Adds an input option for the underlying data source.

Syntax

option(key, value)

Parameters

Parameter	Type	Description
key	str	The option key.
value	str, int, float, or bool	The option value.

Returns

DataFrameReader

Examples

Read a CSV file with the nullValue option set.

import tempfile
with tempfile.TemporaryDirectory(prefix="option") as d:
    df = spark.createDataFrame([{"age": 100, "name": "Alice"}])
    df.write.mode("overwrite").format("csv").save(d)

    spark.read.schema(df.schema).option(
        "nullValue", "Alice").format('csv').load(d).show()
    # +---+----+
    # |age|name|
    # +---+----+
    # |100|NULL|
    # +---+----+