xpath_double

Returns a double value, the value zero if no match is found, or NaN if a match is found but the value is non-numeric.

Syntax

Python

from pyspark.sql import functions as sf

sf.xpath_double(xml, path)

Parameters

Parameter	Type	Description
xml	pyspark.sql.Column or str	XML column or column name.
path	pyspark.sql.Column or str	XPath expression.

Examples

Python

from pyspark.sql import functions as sf
df = spark.createDataFrame([('<a><b>1</b><b>2</b></a>',)], ['x'])
df.select(sf.xpath_double(df.x, sf.lit('sum(a/b)'))).show()

Output

+-------------------------+
|xpath_double(x, sum(a/b))|
+-------------------------+
|                      3.0|
+-------------------------+