diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..4494107
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,21 @@
+score = {'语文':91,'数学':88,'英语':85}
+
+# 请对字典进行遍历，将保存的分数以键值对的形式提取打印出来
+#keys()方法对字典中所有的键进行遍历
+for k in score.keys():   
+    print(k)
+#遍历字典中所有的值  通过values()进行遍历
+for v in score.values():
+    print(v)
+#遍历字典中的键值对   通过items()进行遍历
+for k,v in score.items():
+    print(k,v)
+#如何删除元素  pop()删除字典中的某个值 
+print(score.pop("英语"))
+print(score)
+#clear()清空字典
+score.clear()
+print(score)
+#del 删除字典
+del score
+print(score)
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