diff --git a/README.md b/README.md
index cf6da00..9c4c3c8 100644
--- a/README.md
+++ b/README.md
@@ -1207,8 +1207,7 @@ class MyCollection:
     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
     def __len__(self):
@@ -1224,8 +1223,7 @@ class MySequence:
     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
     def __len__(self):
diff --git a/index.html b/index.html
index eb94c8b..1d1bea8 100644
--- a/index.html
+++ b/index.html
@@ -1122,8 +1122,7 @@ lock = threading.RLock(); <span class="hljs-keyword">with</span> lock: ...
     <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
     <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">__len__</span><span class="hljs-params">(self)</span>:</span>
@@ -1139,8 +1138,7 @@ lock = threading.RLock(); <span class="hljs-keyword">with</span> lock: ...
     <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
     <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">__len__</span><span class="hljs-params">(self)</span>:</span>