已知列表x=【20.30.40.10.8.5】，编程实现以下功能，添加到末尾 ，插入索引号为3，删除收个只Python

可以尝试以下代码实现：

x = [20, 30, 40, 10, 8, 5]

# 添加元素到末尾
x.append(50)
print("After appending 50:", x)

# 在索引号3处插入元素
x.insert(3, 15)
print("After inserting 15 at index 3:", x)

# 删除第一个元素
del x[0]
print("After deleting first element:", x)

输出结果为：

After appending 50: [20, 30, 40, 10, 8, 5, 50]
After inserting 15 at index 3: [20, 30, 40, 15, 10, 8, 5, 50]
After deleting first element: [30, 40, 15, 10, 8, 5, 50]