diff --git a/python/_set.py b/python/_set.py
index fc3bf33e..2ca645fa 100644
--- a/python/_set.py
+++ b/python/_set.py
@@ -16,8 +16,16 @@ class set:
     def clear(self):
         self._a.clear()
 
-    def update(self, other):
-        for elem in other:
+   def update(self, other):
+    if isinstance(other, set):
+        self._a.update({elem: None for elem in other})
+    else:
+        try:
+            iterable = iter(other)
+        except TypeError:
+            raise TypeError("Input must be an iterable")
+        
+        for elem in iterable:
             self.add(elem)
 
     def __len__(self):
@@ -77,4 +85,4 @@ class set:
         return '{'+ ', '.join([repr(i) for i in self._a.keys()]) + '}'
     
     def __iter__(self):
-        return iter(self._a.keys())
\ No newline at end of file
+        return iter(self._a.keys())