#author FK
dict_stu = {
"171001":{
"name":"xiaohua",
"age":21,
"sex":'g',
},
"171002":{
"name":"xiaoli",
"age":21,
"sex":'g',
},
}
new_stu = {
"171008":{
"name":"lili",
"age":23,
"sex":'g',
},
"171002":{
"name":"lulu",
"age":20,
"sex":'g',
}
}
#增加或修改字典中的數據，如果沒有對應的key便增加，如果有對應的key便修改;dict insert data
dict_stu["171003"]={
"name":"xiaoliang",
"age":22,
"sex":'m',
}
#返回字典的成員個數;return the number of items in the dictionary
print("after add item.the length of dict is:",len(dict_stu))
#刪除字典某個key的成員，如果沒有key拋出異常;remove dict_stu[key] from dict,Raises a KeyError if key is not in the map
del dict_stu["171003"]
#返回並刪除字典中某個key的值或default，如果key存在返回key對應的值，如果key不存在，設置了default則返回defalut值，如果沒設置則報錯
print("\033[31;1mtest the pop method:\033[0m",dict_stu.pop("171002"))
#pop方法沒有設置default，測試報錯
#print("\033[31;1mtest the pop method,there is no 171002 key\033[0m",dict_stu.pop("171002"))
#pop方法有設置default，測試正常
print("\033[31;1mtest the pop method,there is no 171002 key:\033[0m",dict_stu.pop("171002","the default is defined"))
#return the number of items in the dictionary
print("after del item.the length of dict is:",len(dict_stu))
#測試key是否在字典中,如果存在返回true ,同key not in d;retrun True if dict_stu has a key 'key' ,else False
print("\033[31;1mtest the 171003 is the dict_stu's key?\033[0m","171003" in dict_stu)
#返回字典中key對應的value,如何沒有返回None;retrun the value for key if key is in the dictionary,else default return None
print("return the 171001's values:",dict_stu.get("171001"))
#如果key在字典中,返回字典中key對應的value;如果key沒有在字典中,返回默認值
print("\033[31;1msetdefault methord return the 171001's values:\033[0m",dict_stu.setdefault("171001","default values"))
print("\033[41;1msetdefault methord return the 171008's values:\033[0m",dict_stu.setdefault("171008","default values"))
#方法1:升級一個字典;update the dictionary
dict_stu.update(new_stu)
print("\033[21;1muse update method update the dict_stu:\033[0m",dict_stu)
#字典的淺復制
dict_copy = dict_stu.copy();
print("\033[41;1mthe copy of the dict_stu\033[0m",dict_copy)
print("test the copy dict is equle the org dict:",dict_copy == dict_stu)
print("the dict of dict_stu",dict_stu)
#return a new view of the dictionary's values
print("\nthe dict_stu.values methord:\t",dict_stu.values())
#創建一個字典通過fromkeys方法,以序列seq中元素做字典的鍵，value為字典所有鍵對應的初始值
dict1_fromkeys = dict.fromkeys([1,2,3,4],50)
dict2_fromkeys = dict.fromkeys([1,2,3,4],[50,20,10,79])
dict3_fromkeys = dict.fromkeys([1,2,3,4],set([50,20,10,79]))
print("\033[31;1mcreate a dict with keys from seq and values set\033[0m",dict1_fromkeys)
print("\033[31;1mcreate a dict with keys from seq and values set\033[0m",dict2_fromkeys)
print("\033[31;1mcreate a dict with keys from seq and values set\033[0m",dict3_fromkeys)
dict1_fromkeys[1]="修改"
#由於是淺復制，所以修改列表中的一個元組，其它節點就都修改了
dict2_fromkeys[1][0]="90"
print("\033[31;1mmodify the dict with keys from seq and values set\033[0m",dict1_fromkeys)
print("\033[31;1mmodify the dict with keys from seq and values set\033[0m",dict2_fromkeys)
#返回字典中所有的值
print("return a new view of the dictionary's values:",dict_stu.values())
#remove all items from the dictionary
dict_stu.clear()
print("after clear the dict is:",dict_stu) |
