Minor Description
Because Spark is built on the JVM, in PySpark, F.lit(-1) % F.lit(2) returns -1. However, the modulus is often desired instead of the remainder.
There is a PMOD() function in Spark SQL, but not in PySpark. So at the moment, the two options for getting the modulus is to use F.expr("pmod(A, B)"), or create a helper function such as:
def pmod(dividend, divisor):
return F.when(dividend < 0, (dividend % divisor) + divisor).otherwise(dividend % divisor)
Neither are optimal - pmod should be native to PySpark as it is in Spark SQL.
