Python masters road [9] python-based iterator and generator, python GeneratorIterator and Generator
1. iterator
An iterator is a way to access collection elements. The iterator object is accessed from the first element of the set until all elements are accessed. The iterator can only move forward without moving back, but there is nothing to do with it, because people seldom go back on the way of iteration.
10 free icon generator webpage designer, free enterprise icon Generator
In this presentation, we provide the best web designer 10 icon generator. These icon generators are free to use, and some are with advanced features that will help you generate compelling and attractive web pages for your website.
In order to pack them up, they can download them freely. Let's
Python iterator, generator and decorator, and python generator Decoration
1. Principles and usage of the iterator:1> principle:An iterator is a way to access a set element. The iterator object is accessed from the first element of the set until all elements are accessed. The iterator can only move forward and not backward, but that's nothing. People seldom step back on the iteration process. In addition, th
Self-compiled DAL three-tier code generator and dal three-tier Code Generator
(1) Create your own solution directory structure as follows:
(2) Compile the Code:
(To use a database, we recommend that you create any database)
The code for creating the configuration file App. config is as follows:
The MainWindow. xaml code is as follows: (change the code in the Grid in MainWindow. xaml)
The MainWindow. xa
Python list derivation and generator expression usage example, python Generator
This article describes the Python list derivation and generator expression usage. We will share this with you for your reference. The details are as follows:
Like the list,List DerivationIt is also represented by square brackets [] and uses a abbreviated for loop. The first part is an
GeneratorGenerator function: The function body contains the yield keyword, the result of which the function executes is the generator, which is essentially an iterator.deffoo ():Print('First ------>') yield1Print('Second----->') yield2Print('Third----->') yield3Print('fouth----->') G=foo () fromCollectionsImportIteratorPrint(Isinstance (g,iterator))Print(g)Yield Features:1. Similar to return, can return a value, but the difference is that the
Additional example of listening file enddeftail (): F= Open ('file','R', encoding='Utf-8') F.seek (0,2) whileTrue:line=F.readline ()ifLine :yield LineImportTime Time.sleep (0.1) G=tail () forIinchg:Print(I.strip ())Send methodSend method:deffunc ():Print('*'*10) A=yield5Print(a)yield10g=func ()Print(g.__next__())Print(G.send ('Wenwen'))#print (g.__next__ ())From which yield begins to execute, send passes a value to the yieldSend cannot be used in the first touch generatorThe number of yield
The Automatic Generator method is used in ionic2. The ionic2 generator method
Ionic generator is a command line function. ionic2 automatically helps us create applications, saving a lot of time and increasing our speed to develop a key part of a project.
Ionic generator allows us to automatically create the following p
List-generateda small topic: add 1 to the values in the list [0,1,2,3].Method 1:a=[0,1,2,3]b=[]for i in range(len(a)): b.append(i+1)a=bprint(a)Method 2:a = [1,3,4,6,7,7,8]for index,i in enumerate(a): a[index] +=1print(a)Method 3:a=[0,1,2,3,4]a=map(lambda x:x+1,a)print(a)for i in a: print(i)Method 4: (List-generated)a=[i+1 for i in range(10)]print(a)Did you see anything? Yes, the same functionality, the implementation of the code is becoming more and more streamlined.Get to the point: ge
Router ACL Access Control List, used to control network rules and traffic through interfaces. One excuse is that only one control list www.2cto.com can be applied in one direction ~ 99) control the extended control list based on the source IP address (serial number 100 ~ 199) based on source and target addresses,
Router ACL Access Control List, used to control network rules and traffic through interfaces. O
The good guy can send me the auth and acl about zendframework in the practice project to learn ZF now. I have two open-source blogs on the internet and read the code. Not that difficult. But there is no example of the key. That's what I said above. Authentication and access control. I have learned thinkphp. in actual projects, user groups and access control nodes can be dynamically added! A few points are confusing! 1zf puts resources and nodes in fil
H3C configures the ACL control configuration for users who access the vswitch through SNMP. 1. The networking requirement only allows SNMP users from 10.110.100.52 and 10.110.100.46 to access the vswitch. 2. The Network Diagram controls the ACL of the SNMP user of the Switch. 3. Configure step # define the basic access control list and sub-rules.
Org.apache.hadoop.hbase.security.token.ZKSecretWatcher.updateKeyInZK (zksecretwatcher.java:197) at Org.apache.hadoop.hbase.security.token.AuthenticatIontokensecretmanager.rollcurrentkey (authenticationtokensecretmanager.java:257) at Org.apache.hadoop.hbase.security.token.authenticationtokensecretmanager$leaderelector.run ( authenticationtokensecretmanager.java:317)Second settlement (Day 1)After adding Skipacl, restart ZK and restart HBase. Keep the Skipacl open for the time being so that hbase
.jpg " alt= "Wkiol1vgeohz-ppuaahu3lqa9_w902.jpg"/>2. Use the ping command to verify that the network is interoperable650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/6C/53/wKiom1VGEYHg1ffmAAJ5w6qMKAI032.jpg "title=" 2.jpg " alt= "Wkiom1vgeyhg1ffmaaj5w6qmkai032.jpg"/>3. Configure access control lists (ACLs) for network requirementsac configured on the R1 L650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6C/4F/wKioL1VGFNvgC9OjAAD5aqL5DVY644.jpg "title=" 6.jpg " alt= "Wkiol1vgfn
Problem description:
Wireless 2 can access the server in the 192.168.1.0 network segment, but the server in the 1.0 network segment cannot be accessed through port ing.
Topology:
Firewall Internet interface 0/1 Intranet interface 0/2
Four CIDR blocks of layer-3 h3c5500
192.168.1.0 server network segment
192.168.20.0 office network segment
192.168.50.0 wireless 1
192.168.60.0 wireless 2
Solution:
Firewall -- ACL--3002 edit -- New:
Filter
whether the PC can access the Internet vro
650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M01/47/C0/wKioL1P_Si6ABN3kAACztgC6EPE459.jpg "Title =" 5.png" alt = "wkiol1p_si6abn3kaacztgc6epe459.jpg"/>
Yes
Note: because the Internet cannot refer to the IP address of the private network, dynamic route rip is used below to simulate the experiment.
R4
R4 (config) # router rip
R4 (config-router) # network 192.168.34.0
R4 (config-router) # network 12.0.0.0
R5
R5 (config) # router rip
R5 (co
ACL Conferencing (annual meeting of the Association for Computational Linguistics) is the most advanced academic conference in the field of natural language processing and computational linguistics, hosted by the Association of Computational Linguistics, one session per year.
Involved
Dialogue (dialogue)
Chapter (Discourse)
Evaluation (EVAL)
Information Extraction (IE)
Information Retrieval (IR)
Language Generation (Languagegen)
Language Resources (La
Router ACL Access Control List, used to control network rules and traffic through interfaces. One excuse is that only one control list www.2cto.com can be applied in one direction ~ 99) control the extended control list based on the source IP address (serial number 100 ~ 199) control the name control list based on the source and target addresses, transport layer protocol, and application port number. The control list replaces the data with the name. T
In the official spring security documents, only the security ACL hsql script is provided. However, spring does not explicitly provide the database creation script and configuration instructions when using Oracle databases, the following are the SQL scripts and configurations used when you use the Oracle database:
The SQL script is as follows:
Sequence
The spring configuration snippets are as follows:
ACL Engineering is a cross-platform (support LINUX,WIN32,SOLARIS,MACOS,FREEBSD) network communication Library and server programming framework, while providing more functional libraries. With this library, users can easily write server programs that support multiple modes (multi-threaded, multi-process, nonblocking, trigger, UDP, and co-mode), WEB applications, and database applications. In addition, the library provides client communication libraries
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