增加:
a={"name":"唐僧","age":18,"sex":"男"} a["name"]="杀神" print(a) a={"name":"唐僧","age":18,"sex":"男"} a["name1"]="杀神" print(a) {'name': '唐僧', 'age': 18, 'sex': '男', 'name1': '杀神'}#没有name1这个键值，添加键和键值
删除：
a={"name":"唐僧","age":18,"sex":"男"} a.pop("name") print(a) {'age': 18, 'sex': '男'}
a={"name":"唐僧","age":18,"sex":"男"} b=a.pop("name1",None) print(b," " ,type(b)) a={"name":"唐僧","age":18,"sex":"男"} b=a.pop("name1","没有这个键值") print(b," " ,type(b)) a.clear()#清空字典
del a #删除整个字典
改：
a={"name":"唐僧","age":18,"sex":"男"}c={"name":"孙悟空","age":500,"sex":"男","wuqi":"嘴"}a.update(c)print(a)print(c) {'name': '孙悟空', 'age': 500, 'sex': '男', 'wuqi': '嘴'}
{'name': '孙悟空', 'age': 500, 'sex': '男', 'wuqi': '嘴'}
a={"name":"唐僧","age":18,"sex":"男","职业":"和尚"} c={"name":"孙悟空","age":500,"sex":"男","wuqi":"嘴"} a.update(c) print(a) print(c) {'name': '孙悟空', 'age': 500, 'sex': '男', '职业': '和尚', 'wuqi': '嘴'}
{'name': '孙悟空', 'age': 500, 'sex': '男', 'wuqi': '嘴'}
#a有的键值对，c没有，则保存。