Python Automated test Aries-WEEK3 Dictionary

#和列表一样, it's just immutable variables.
#定义元组时, if the tuple has only one element, add a comma after the element, or it will be a string
Lis = [] #列表这样定义
TP = (' 127.0.0.1 ', ' 3306 ')
#lis [0]= ' 3306 ' #不能这样写 because this list is empty, subscript 0 does not exist, use append or insert
Print (LIS)
Print (TP)

TP = (' 127.0.0.1 ', ' 3306 ') #元组
names = [Lingyul, ' Panyang '] #列表
name = ' Lingyul,cyc '
New_lis = tuple (LIS)
Print (Type (new_lis))

#强制类型转换的int float str list tuple




#字符串, List, dictionary
#字典是无序的
#定义一个字典
info = {
' Name ': ' Lingyul ',
' Age ': 18,
' Sex ': ' Woman ',
' ID ': ' 1 ',

}
#查询
Print (info[' name '])
Print (Info.get (' id '))
Print (Info.get (' addr ')) #get方法取值找不到时会返回none # # # # # # # #运行结果为none
Print (Info.get (' addr ', ' Beijing ')) #如果get取不到值, return the value that follows #运行结果为beijing
#这两个的区别是: Use [] to get a value if the value does not return an error message
#get方法取值找不到时会返回none

#字典的取值就这两种方法

#增
info[' addr '] = ' Beijing '
Print (Info.get (' addr '))

Info.setdefault (' phone ', 110110)
Print (info)

#修改
info[' id ']=7 #这种方法既能新增也能修改, in case there is an ID that deserves to be modified, in the absence of this worthy case will be added
Print (info)

#删除
del info[' addr ']
Print (info)

#字典是无序的, so you must specify what to delete when you delete with pop
Print (Info.pop (' phone '))
Print (info)

Info.popitem () #随即删除一个元素

Info.clear () #清空字典

#????????????????????????????????????????????????????????????????????????????
New_infos = [
{
' YANGWB ':
{
' ID ': 1,
' Sex ': ' Mans ',
' Phone ': 250,
' Addr ': ' huoying '

},
' Yangwn ':
{
' ID ': 2,
' Sex ': ' Mans '
}

}

]

Print (New_infos[0].get (' YANGWB '). Get (' addr '))




all={
' Car ':
{
' Color ': [' red ', ' yellow ', ' black '],
' Moeny ': 111111,
' Pailiang ': ' 2.5L ',
' Name ': ' BMW '


},
' Car1 ':
{


},
' Car2 ':
{



}

}

Print (All.keys ()) #获取字典的所有key
Print (All.values ()) #获取所有的value
Print (' Items is: ', All.items ()) #同时获取字典的key和values, circular use

Info2 = {
' Name ': ' Lingyul ',
' Age ': 18,
' Sex ': ' Woman ',
}
For k,v in Info2.items ():
Print ('%s is%s: '% (k,v)) # The purpose of the items method is to take both key and value to the loop
#如果数据比较大时, it will be very slow, it is first to take the dictionary out into a string, the value of the string is taken

#这种效率比较高
For K in Info2:
Print (' k is: ', K)
Print (Info2[k])


#把两个字典合并在一起, if you have the same key, update the value
Info.update (Info2)

#python2中判断key是否存在, not in Python3.
Info.has_key (' name ')
Print (' name ' in info) #python3中直接用in判断是否存在某个key值

Python Automated test Aries-WEEK3 Dictionary