array slice

pykusto/_src/functions.py

@@ -42,9 +42,12 @@ class Functions:
         """
         return _ArrayExpression(expr).array_length()
 
-    # def array_slice(): return
-    #
-    #
+    def array_slice(expr: ArrayType, start: NumberType, end: NumberType) -> ArrayType:
+        """
+        https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/arrayslicefunction
+        """
+        return _ArrayExpression(expr)[start, end]
+
     # def array_split(): return
     #
     #

test/test_functions.py

@@ -32,6 +32,12 @@ class TestFunction(TestBase):
             Query().where(f.array_length(t.arrayField) > 4).render()
         )
 
+    def test_array_slice(self):
+        self.assertEqual(
+            " | extend sliced = (array_slice(arrayField, 1, 2))",
+            Query().extend(sliced=f.array_slice(t.arrayField, 1, 2)).render()
+        )
+
     def test_bag_keys(self):
         self.assertEqual(
             " | where (array_length(bag_keys(mapField))) > 4",