code: def otherwise(self, value):
          
          v = value._jc if isinstance(value, Column) else value
          jc = self._jc.otherwise(v)
          return Column(jc)
docs: Evaluates a list of conditions and returns one of multiple possible result expressions.
          If :func:`Column.otherwise` is not invoked, None is returned for unmatched conditions.
  
          See :func:`pyspark.sql.functions.when` for example usage.
  
          :param value: a literal value, or a :class:`Column` expression.
  
          >>> from pyspark.sql import functions as F
          >>> df.select(df.name, F.when(df.age > 3, 1).otherwise(0)).show()
          +-----+-------------------------------------+
          | name|CASE WHEN (age > 3) THEN 1 ELSE 0 END|
          +-----+-------------------------------------+
          |Alice|                                    0|
          |  Bob|                                    1|
          +-----+-------------------------------------+