diff --git a/README.md b/README.md
index 07e7822..085d8d6 100644
--- a/README.md
+++ b/README.md
@@ -1205,8 +1205,9 @@ class MyIterable:
     def __init__(self, a):
         self.a = a
     def __iter__(self):
-        for el in self.a:
-            yield el
+        return iter(self.a)
+    def __contains__(self, el):
+        return el in self.a
 ```
 
 ```python
diff --git a/index.html b/index.html
index e452d20..09e8692 100644
--- a/index.html
+++ b/index.html
@@ -1144,8 +1144,9 @@ Hello World!
     <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">__init__</span><span class="hljs-params">(self, a)</span>:</span>
         self.a = a
     <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">__iter__</span><span class="hljs-params">(self)</span>:</span>
-        <span class="hljs-keyword">for</span> el <span class="hljs-keyword">in</span> self.a:
-            <span class="hljs-keyword">yield</span> el
+        <span class="hljs-keyword">return</span> iter(self.a)
+    <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">__contains__</span><span class="hljs-params">(self, el)</span>:</span>
+        <span class="hljs-keyword">return</span> el <span class="hljs-keyword">in</span> self.a
 </code></pre></div></div>