diff --git a/python/pyspark/sql/column.py b/python/pyspark/sql/column.py
index 81fd4e782628a..bf28d6236d9aa 100644
--- a/python/pyspark/sql/column.py
+++ b/python/pyspark/sql/column.py
@@ -316,6 +316,10 @@ def isin(self, *cols):
 
     isNull = _unary_op("isNull", "True if the current expression is null.")
     isNotNull = _unary_op("isNotNull", "True if the current expression is not null.")
+    isNaN = _unary_op("isNaN", "True if the current expression is NaN.")
+    isnull = _unary_op("isNull", "True if the current expression is null.")
+    notnull = _unary_op("isNotNull", "True if the current expression is not null.")
+    isnan = _unary_op("isNaN", "True if the current expression is NaN.")
 
     @since(1.3)
     def alias(self, *alias):