diff --git a/day4/TODO.py b/day4/TODO.py
new file mode 100644
index 0000000..c02b7f1
--- /dev/null
+++ b/day4/TODO.py
@@ -0,0 +1,15 @@
+list=['原神']
+for i in list:
+    list.append(input('何事？'))
+    a=input('何事终了？')
+    if a in list:
+        list.remove(a)
+    else:
+        pass
+    print('未尽之事：',list)
+    b = input('是否下一周目(1是2否)')
+    if b == 1:
+        continue;
+    else:
+        print('未尽之事：',list)
+        break;
\ No newline at end of file
diff --git a/day4/列表.py b/day4/列表.py
index e69de29..9e6fd10 100644
--- a/day4/列表.py
+++ b/day4/列表.py
@@ -0,0 +1,10 @@
+a = ["b",2,3]
+a.remove("b")#直接删
+del a[0]#删索引值无[]默认整个列表
+a.pop(0)#删索引值（用法同上）
+a.clear()#清空
+a.append(input(""))#添加
+a[0]=''#更改第"0"个
+a.sort()#按顺序整理
+a.reverse()#翻转
+len(a)
\ No newline at end of file