Lesson 025: Dictionary: when the index does not work well | after-school test questions and answers

0. When you hear the little friends talking about "maps", "hash", "hash" or when the "associative arrays", in fact, that is what they discuss it?

　　me: Dictionary

 

1. Try to data ( 'F': 70, 'C': 67, 'h': 104, 'i': 105, 's': 115) to create and access a dictionary corresponding to the key value of 'C' ?

　　me：

dict1={'F': 70, 'C': 67, 'h': 104, 'i': 105, 's': 115}
print(dict1["C"])

 

2. Use square brackets ( "[]") enclosed data we call lists, use curly braces ( "{}") We called dictionary data enclosed, right?

　　me: No, just a list of expressions is [] enclosed data, expressed in the form dictionary is the use of the data enclosed {}, {} enclosed but using data dictionary is not expressed

　　Answer:

3. How do you understand the dictionary can do some things, but the "universal" list but difficult to achieve (Chenqie do T_T)?

　　me：

　　Answer:

4. the following code, they are performing the same operation it? You could tell the difference right?

a = dict(one=1, two=2, three=3)
b = {'one': 1, 'two': 2, 'three': 3}
c = dict(zip(['one', 'two', 'three'], [1, 2, 3]))
d = dict([('two', 2), ('one', 1), ('three', 3)])
e = dict({'three': 3, 'one': 1, 'two': 2})

　　me：

　　Answer:

5. As shown, you can infer played codes mosaic part of it?

 

 　　me：

= DATE " 100, small turtles, M " 
MyDict = {}
(MyDict["id"],MyDict["name"],MyDict["sex"])=date.split(",",3)
print("ID: " + MyDict["id"])
print("name: " + MyDict["name"])
print("sex: " +MyDict["sex"])

　　Answer:

Hands:

0. Try to write a program using the address book properties dictionary bar, function as shown:

 

 　　me：

print("""
|---欢迎进入通讯录程序---|
|---1：查询联系人资料 ---|
|---2：插入新的联系人 ---|
|---3：删除已有联系人 ---|
|---4：退出通讯录程序 ---|
 """)

dictTX=dict()
while 1:
    InputY = int(input("请输入相关的指令代码："))
    if InputY == 1:
        name = input("请输入联系人姓名：")
        print(name + "：" + dictTX[name])
    elif InputY == 2 :
        name = input("请输入联系人姓名：")
        if name in dictTX:
            print("您输入的姓名已经在通讯录中 -->> ",name," : ",dictTX[name])
            temp = input("是否需要修改用户资料（YES/NO）:")
            if temp == "YES":
                namder = input("请输入用户联系电话：")
                dictTX[name] = namder
        else:
            namder = input("请输入用户联系电话：")
            dictTX[name] = namder
    elif InputY == 3:
        name=input("请输入联系人姓名：")
        if name in dictTX:
            del dictTX[name]
        else:
            print(name,"不在通讯录中；")
    elif InputY == 4:
        print("|--- 感谢使用通讯录程序 ---|")
        break