字典操作

练习内容

# 字典的基本操作\nstudent = {\n "name": "张三",\n "age": 20,\n "grade": "大二"\n}\n\nstudent["major"] = "计算机" # 添加新键值对\nprint(f"学生信息: {student}")\nprint(f"姓名: {student['name']}")\nprint(f"所有键: {student