2025-09-10:仓库迁移

4.迭代器与生成器/2.委托迭代.py

@@ -0,0 +1,28 @@
+
+
+if __name__ == "__main__":
+    class Node:
+        def __init__(self, value):
+            self._value = value
+            self._children = []
+
+        def __repr__(self):
+            return 'Node({!r})'.format(self._value)
+
+        def add_child(self, node):
+            self._children.append(node)
+
+        # 对象的内置iter方法，在迭代对象的时候将迭代请求转发，返回children的迭代器对象
+        # iter函数和len函数一样，底层原理都是返回对象的底层方法，iter返回对象的__iter__()
+        def __iter__(self):
+            return iter(self._children)
+
+    root = Node(0)
+    child1 = Node(1)
+    child2 = Node(2)
+    root.add_child(child1)
+    root.add_child(child2)
+
+    for ch in root:
+        print(ch)
+