This article will tell you how to use the Python requests module to retrieve a web page content by page URL and then save the web page content to a local file step by step.
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Scrapy is a Python library that can be used to crawl web pages and extract the web page elements by XPath or CSS selector in python code. This article will tell you how to create a Scrapy project and how to implement the Scrapy related classes in the project to crawl and extract a job
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Android foreground service is an android service object. It always runs in the foreground, this can avoid service objects being recycled by the android system when android os does not have enough resources. Android foreground service can interact with users through notification. It is usually used in a music player, file downloader, etc which user
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Python matplotlib module is used to draw graphical charts. This article will tell you how to use matplotlib to draw points and lines. But before you can use it, you should make sure it is installed. You can follow the below steps to check, if there is no error message printed out, then it means
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When you use Node JS to implement an HTTP / HTTPS web server, you always follow the general steps as below. But if you close the terminal or kill the node process unexpectedly, the HTTP web server will stop also. This article will tell you how to avoid such an issue and make the node
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The previous article Android Pick Multiple Image From Gallery Example has told us how to browse an image gallery to select and show images use Intent.ACTION_GET_CONTENT intent. In that example, we save all user-selected images android file path URI in a list. Then we display those images one by one.
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After you installed android studio, you still need to configure some android SDK environment variables then you can use them easily. This article will tell you how to correctly configure Android SDK environment variables such as ANDROID_HOME, PATH on both Windows and macOS.
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In this article, I will tell you several methods about how to use python os, pathlib module to list files in directory. It will also tell you how to use the python fnmatch module to filter out special files that match the file name pattern.
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Mac OS X has installed python by default, but the version is 2.7.10. It is a little older, so I upgrade python to a newer version ( python 3.7 or python 3.9 ). But after installing the new version, when I open a terminal and run python command, it still uses Python 2.7. This article
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After you create a maven project in eclipse for spring application development, you always need to use maven to clean, build, install, and deploy the spring application to a tomcat server to see the result. This article will tell you how to make maven deploy to tomcat in eclipse project.
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