feat: add iter_test.py

iter_test.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+
+class MyNumbers:
+    def __iter__(self):
+        self.a = 1
+        return self
+
+    def __next__(self):
+        if self.a <= 10:
+            x = self.a
+            self.a += 1
+            return x
+        else:
+            raise StopIteration
+
+
+if __name__ == "__main__":
+    myNumbers = MyNumbers()
+    for x in iter(myNumbers):
+        print(x)