访问对象中的值
demo = ["name": "a", "age": 19]
print(demo["name"])
# a
print(demo)
# ["name": "a", "age": 19]
循环输出对象中的值
demo = ["name": "a", "age": 19]
for index, item in demo.items():
print(index, item)
# name a
# age 19
修改值
demo = ["name": "a", "age": 19]
demo["name"] = 'b'
print(demo)
# ["name": "b", "age": 19]
添加键值
demo = ["name": "a", "age": 19]
demo["class"] = '9班'
print(demo)
# ["name": "a", "age": 19, "class": "9班"]