Programming VIP

Summary Strings in Python exist as a powerful set of processing tools, not as hard to use in class C. Because Python provides a series of string operation methods, from case conversion, slice operation to search and so on, which almost meet the daily use scenarios. Of course, if it can not meet the needs, it can also help more ...

I. login authentication function user_info = { 'user': None } #Login function authentication def login(): username = input('Please enter the account name:').strip() password = input('Please input a password:').strip() with open(r'a.txt', 'r', encoding='utf-8')as f: for line in f: f.readline() name ...

I. Profile multi environment support 1. Multiple Profile files When we write the main configuration file, the file name can be: application-{profile}.properties/yml application.properties is used by default 2. yml supports multi document block mode server: port: 8080 spring: profiles: active: dev ##Activate dev configuration bl ...

File operation ② Binary mode parameter in the open() method: Tread text file (default) b read binary Binary operation by changing mode parameter file_name = 'DD.jpg' # Read mode # Tread text file (default) # b read binary # t b and r w a are added together. They are all parameters of mode with open(file_name,'rb') as fi ...

Preface The text and pictures of the article are from the Internet, only for learning and communication, and do not have any commercial use. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Author: tomato ha ha PS: if you need Python learning materials, you can click the link below ...

File Processing Three big questions about files: What is a file?Why use files?How do I use files? File (File System) is a tool provided by the operating system to operate hard disks The file system is used to permanently save data How to operate the file Relative and absolute paths Relative path: The path from the current path relative to ...

 .NET Framework : 4.7.2        IDE : Visual Studio Community 2019         OS : Windows 10 x64     typesetting : Markdown         blog : blog.csdn.net/yushaopu        github : github.com/GratefulHeartCoder   xml file <?xml version="1.0" encoding="utf-8"?> <cultures> <taoists count="100" comme ...

1. activity_main.xml Add the LinearLayout of the horizontal layout in the LinearLayout of the vertical layout, and then add EditText product name, EditText amount, ImageView add button <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://sch ...

First of all, I declare that my crawler is on the unbuttu16.04 system, mainly referring to the following BLOGhttps://blog.csdn.net/qq_40774175/article/details/81273198 On this basis, some modifications have been made to improve it. 1. You need to know Python's requests library. You can get the original information of t ...

1. Solve the problem of Chinese code disorder (1) dynamic loading or not, (2) source data acquisition Map network on the other side: First page address: http://pic.netbian.com/4kmeinv/ Second pages: http://pic.netbian.com/4kmeinv/index_2.html Third pages: http://pic.netbian.com/4kmeinv/index_3.html #Step 1: there is a bug in the followin ...