Linux Shell Process Control Statement Instance

　
Comment closed 　 2291 views

The Linux shell has its own set of flow control statements, including conditional statements (if), circular statements (for, while)， Select the statement (case). Next, I will introduce the usage of each statement through examples. I Shell conditional statement (if usage) if statement structure [if/then/el read the whole passage

Detailed explanation of Linux system structure

　
Comment closed 　 2298 views

Linux system generally has four main parts: kernel shell、 File systems and applications. Kernel The shell and file system together form the basic operating system structure, which enables users to run programs, manage files, and use the system. Some hierarchies are shown in Figure 1-1.   1、 Linux kernel&nb read the whole passage

Python gracefully dumps non-standard types

　
Comment closed 　 3243 views

One thing that is often done when programming in Python is the conversion of Python data types and JSON data types. But there is an obvious problem, JSON, as a data exchange format, has fixed data types, but Python, as a programming language, can write custom data types in addition to built-in data types. Wall crack recommendation read the whole passage

Getting Started with Crawlers: Firefox combines with Scrapy Shell to crawl web data

　
Comment closed 　 4650 views

Originally, this article was intended to follow the previous Python basics, but because of too much basic information, it will be really tiring. So let's pause one or two articles about Python basics. This article shares some interesting things. Today, I created an organization on Github called SpiderMan. The purpose of this organization is to play Python read the whole passage

Python list operation and precautions

　
Comment closed 　 2459 views

The previous articles introduced the introduction and principle of Python list, and also made simple operations. But those operations are really simple. If you are a beginner, I believe you can master them with a little time. This article will introduce a more important operation of the list, traversal. The meaning of traversal can be understood as a loop, which allows you to take one or read the whole passage