Python中dict的使用

创建/增加dict数据：

---

 方法一：常规创建

d1 = {"name":"xiaoming","age":15}

方法二：动态创建

d2 = {}

d2["name"] = "xiaohong"

d2["age"] = 16

方法三：关键字创建

d3 = dict(name = 'xiaohei',age = 18)

方法四：键值创建,该方法优势是通过不同键值，可以在dict中包含多个元素

d4 = {}

d4[1001] = {"name":"xiaoming","age":15}

d4[1002] = {"name":"xiaohei","age":16}

d4[1003] = {"name":"xiaohong","age":18}

方法五：dict - - fromkeys方法

d5 = dict.fromkeys(['a',3],'B')

---

 

删除dict

---

 

 del删除：

---

 

d6 = {"name":"xiaolan","age":16,"init":['跑步','唱歌','看电影']}

del d6['name']

pop删除dict：

d7 = {"name":"xiaohua","age":16,"init":['跑步','唱歌','看电影']}

d7.pop()

d7.pop('name')

clear清空dict：

d8 ={"name":"xiaohua","age":16,"init":['跑步','唱歌','看电影']}

d8.clear()

---

 

修改dict：

---

 

d9 = {"name":"xiaowang","age":18}

d10 = {}

d10[1001] = {"name":"xiaoming","age":15}

d10[1002] = {"name":"xiaohei","age":16}

d10[1003] = {"name":"xiaohong","age":18}

d9["age"] = 20

d10[1001]["age"]=25

---

 

查询dict：

---

查询输出dict

代码：

 1 d11 = {}
 2 d11[1001] = {"name":"xiaoming","age":15}
 3 d11[1002] = {"name":"xiaohei","age":16}
 4 d11[1003] = {"name":"xiaohong","age":18}
 5 
 6 print("d11的值:%s"%d11)
 7 print("d11的items结果：%s"%d11.items())
 8 print("d11的keys结果：%s"%d11.keys())
 9 print("d11的values结果：%s"%d11.values())
10 print("======打印items值======")
11 for k,v in d11.items():
12     print("%s的value值为：%s"%(k,v))
13 print("======打印value值======")
14 for va in d11.values():
15     print("d11的value值为：%s"%va)
16 print("======用key打印key和value======")
17 for key in d11.keys():
18     print("{key1}的value值为：{val1}".format(key1=key,val1=d11[key]))

运行结果：

标签：d11,16,Python,age,dict,使用,print,name
来源： https://www.cnblogs.com/wangwang365/p/14217185.html