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= [' 1 ', ' 2 ', ' 3 ', ' 4 '. ' 5 ']dict = Employee (name= ' Cai ', age=18) def func (X,y,*args,**kwargs): #定义一个 *args, which means no limit to the number of arguments, or to a list print (x) print (y) print (*args) print (**kwargs) func (1,2,3,4,5) #传多个参数给函数func (1,2,*list) #将列表传到函数中, do not pass default to empty tuple func (1, 2, *list,**dict) #将字典当成参数传到函数中, no default is empty dictionary three, high-order function Introduction: 1, a function name as an argument to ano

forecast is based on a balance between the most recent and long-term observations. Beta 0 indicates that the slope of the trend part is listed unchanged throughout the time series and is equal to the initial value, this also conforms to our intuitive feeling, the level changes very much, but the trend part slope is basically invariable, on the contrary gamma=0.96 indicates that the current season partial forecast is based only on the nearest observation value.We also draw the predicted values a

ignoreobject () to re-enable liveness-checking in an Object-by-object basis.) "Normal" mode, as the name implies, is the one used most often at Google. It ' s appropriate for everyday heap-checking use.In addition, there is and other possible modes: as-is local as-is is the most flexible mode; It allows specify the various knobs of the heap checker explicitly. local activates the explicit Heap-check instrumentation, but does no turn on any whole-progra M leak c

from here, if not configured to see the resolv.conf inside the settings, so it is easier to configure DNS here.# interfaces (5) file used by Ifup (8) and Ifdown (8) Auto loiface lo inet loopbackauto eth0iface eth0 inet staticaddress 192. 168.1.151netmask 255.255.255.0gateway 192.168.1.2dns-nameservers 202.38.64.1= = Restart Virtual Machine Network = =After the configuration is complete, there are several ways to restart the network:sudo service networking restart or sudo/etc/init.d/networking r

Online managementQuery all available installation packages: Yum ListSearch the server for the key-related packages: Yum searchInstallation: Yum-y Install package name (-y auto Answer Yes)Upgrade: Yum-y Update package nameUninstall: Yum-y Remove package Name(4) Source package installation1. Preparation: Installing the C language compiler (GCC)2. Note:SOURCE Package Save Location:/usr/local/src/Software Installation Location:/usr/local/3. Installation StepsDownloadExtractGo to Catalog./config--pr

The arithmetic operation of bash script programming+,-,*,/, * *,%Arithmetic operation format:(1) Let var= arithmetic operation expression(2) var=$[arithmetic operation expression](3) var=$ (arithmetic operation expression)(4) var=$ (expr $ARG 1 $OP $ARG 2)Note: The multiplication symbol requires the use of escape characters in some scenarios;Exercise: Write a script to complete the following functions:Add three users;The sum of the UID of the three users;Shell Programming (

"Copyright Notice: respect for the original, reproduced please retain the source: blog.csdn.net/shallnet, the article only for learning Exchange, do not use for commercial purposes"loops are also a way to change the order in which instructions are executed, repeating the execution until the condition is met. We can use conditional jump directives to create loops, but in fact there is a simpler series of loop instructions in assembly language. The loop instruction uses the ECX register as the cou

org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.client.RestTemplate;* 描述:调用提供者的 `home` 方法* @author yanpenglei@RestControllerpublic class ConsumerController { @Autowired private RestTemplate restTemplate; @HystrixCommand(fallbackMethod = "defaultStores") @GetMapping(value = "/hello") public String hello() { return restTemplate.getForEntity("http://eureka-provider/", String.class).getBo

Builder mode: Used primarily to create complex objects in which the built-in order of internal builds is usually stable, but the construction of objects within the object often faces complex changes. The advantage is that the construction code is separated from the presentation code, and because the builder hides how the product is assembled, the internal representation of a product needs to be changed, and only one concrete builder can be defined. The builder pattern is when the algorithm that

Select drop-down listProperty:Options[]: Returns an array that contains all the options in the drop-down list.SelectedIndex: Sets the index number of the selected item in the Return drop-down list.Length: Returns the number of options in the drop-down list box. If set to 0, clears the list box.Method:Add (New,old): Adds an option. If old is empty, it is added to the end, and old has a value before it is added to old.Event:OnChange: The event that is called when the option is changed.Option Objec

function " "begin=time.time () filelist=os.listdir (Cdcpath) # used to record the originating search thread searchlist=[]forcdcfinfilelist: pathcdcf= "%s\%s" % (CDCPATH,NBSP;CDCF) #print (PATHCDCF) # Initialize thread objects current=grepit (Pathcdcf,keyword) # Append record thread queue searchlist.append (current) # Thread Handling Current.start () forsearcherinsearchlist: searcher.join () print ("Searchfrom ",searcher.cdcf," Out ", searcher.report) print (" Usage%ss " % (Time.time () -

implementing the input and output, it is the key to flip the string.How to flip? Using the angular index of a character array to transform??? Please, this is not the way we used to learn C language, and for the people who have studied data structure, the first reaction to think of is such a treasure- stack !Advanced after out, this is the characteristics of the stack! This is in front of C language Hardening (ii) design can be used to find the smallest elements of the stack spoke.Put the first

: (1) The file does not exist (2) There is no operation permission on the file or read-only.RenamingYou can rename a file or folder Os.rename (Oldfilename, NewFileName)Create a new folder in the OS folder test, file Test.txt1 " "Renaming folders/Files" "2 Os.chdir (File_dir)3 Print(Os.listdir (OS.GETCWD ()))4Os.rename ("Test","test1") 5Os.rename ("Test.txt","Test1.txt")#Rename , note the need to have an extension6 Print(Os.listdir (OS.GETCWD ()))The resulting results are as follows: (1) oldfi

()); } @Override Public intDelete (listRecords) { for(Sysuser record:records) {delete (record); } return1; } @Override PublicSysuser FindByID (Long id) {returnSysusermapper.selectbyprimarykey (ID); } @Override Publicpageresult findpage (pagerequest pagerequest) {returnPageutils.getpageresult (Pagerequest, GetPageInfo (pagerequest)); } /*** Call the paging plugin to complete the page pagination *@paramPagequery *@return */ PrivatePageinfoGetPageInfo (pagerequest page

object (xxxexception)3. The statement after the program does not execute, automatically returns to the previous level method, and the previous method accepts the exception object for processing4. Treatment of the upper-level approach--the method has the ability to process (process in this method)--the method does not have the ability to process (continue to throw), if the current method is main, he throws the JVM, which causes the JVM to terminate the program's runHow the exception is handledTh

in the controller.@RestControllerpublic class UserController { @Resource private UserMapper userMapper; @GetMapping(value = "/users") public ListProblems encountered in actual developmentIn the normal development, we often encounter the return tree structure, shown below[ { "id": "1", "name": "山东", "pid": "0", "children": [ { "id": "2", "name": "济南", "pid": "1", "children": [ { "id": "3", "name": "高新区",

------------------------------------------------------------------------------------Welcome reprint, please attach the linkhttp://blog.csdn.net/iemyxie/article/details/42560125 -----------------------------------------------------------------------------------The EM algorithm is broadly divided into two-step--e steps and M-Steps.In the process of solving operation, it is necessary to use Gaussian distribution, inverse matrix and other mathematical knowledge. The EM algorithm first combs the basi

Keyword: typedefusage: define a new name (alias) for various data typestypedef and BASIC data typestypedef int Integer; Integer a= 8;You can also alias an alias based on thetypedef Integer Myinteger; Myinteger AA = 8;The original data type can also be used normallytypedef and Pointerstypedef Char *String; String str = "stone";typedef and Structural Bodytypedefstruct person Per; // This will not bring up the struct keyword when defining struct variables.Per p; P.name = "xyz";Define and

elements like vectors :Push_back is a member function of a vector that can add a value as the last element of a vector. Cases:Vectorfor (int i = 0; I!=100; i++)V2.push_back (i);Note: Because vectors can add elements efficiently and quickly at run time. Therefore , it is sometimes unnecessary to define the size of a vector . Even the definition will be superfluous. Other vector operations:V.empty () if v is empty, returns TrueV.size () returns The number of elements in VV[] returns a referen

cost of inserting and querying "key-value pairs" is fixed.The capacity capacity and load factor load factor can be set through the constructor to adjust the performance of the container. TREEMAP: based on the implementation of red-black tree data structure. When you look at key or key-value pairs, they are sorted (the order is determined by comparabel or comparator). TreeMap is characterized by the fact that the results you get are sorted. TreeMap is the only map with the Submap () method, whic