Learn how to design a simple book management database, define Django models for authors, publishers, books and their many‑to‑many relationships, and perform common ORM operations such as retrieving all records, filtering with conditions, using first(), get(), and inspecting the generated SQL.
This article explains why the Flask‑Redis extension cannot switch Redis databases, describes the underlying limitation of redis‑py, and provides a Python class library that enables dynamic database selection, data push/pull, and clean connection handling for Flask applications.
This article explains the concept of the goto statement, why it is generally discouraged, and demonstrates how to install and use the third‑party goto‑statement package in Python to write loops and jumps with example code, while advising limited usage.
This tutorial explains how to create a Python‑based eBPF tool using the bcc framework to trace MySQL Group Replication's apply_data_packet function, covering environment setup, BPF program writing, attaching probes, and displaying real‑time thread and timestamp information.
This guide walks you through thirteen indispensable PyCharm plugins and built‑in features—ranging from shortcut helpers and Vim mode to Jupyter notebooks, code profiling, and REST testing—showing how each tool can streamline Python development and improve coding efficiency.
This article explains Python’s memory management by exploring how objects and references work, demonstrating reference counting, the role of the id() function, the impact of object caching, and how Python’s garbage collector handles reference cycles through generation-based collection.
This article explains the concept of coroutines, compares them with ordinary functions, shows Python code examples of yielding and resuming execution, illustrates their historical background, and describes how they are implemented using heap‑allocated stack frames to achieve lightweight, user‑level concurrency.
Using publicly available statistics from the National Bureau of Statistics, this article visualizes and analyzes China’s divorce rates over the past decade, comparing national trends, provincial variations, and city-specific patterns such as Beijing versus Shanghai, revealing a steady increase and regional disparities.
This article explains socket fundamentals and walks through creating a simple UDP‑based chatroom in Python, covering basic socket creation, common methods, a straightforward server‑client example, and an enhanced multi‑user implementation with full source code and execution details.
This article demonstrates how to use Python's zipfile module to open and extract password‑protected ZIP archives, explains the required parameters, shows successful and failed extraction attempts, and provides a simple brute‑force script that iterates numeric passwords to recover the archive's contents.
This tutorial explains how to analyze the Mayi short‑rent website, overcome its anti‑scraping defenses by setting appropriate Cookie and User‑Agent headers, and use Python's urllib2 and BeautifulSoup to extract rental details, store them in CSV, and optionally employ Selenium.
This article explains how to control request frequency in Python using the ratelimiter library for synchronous and asynchronous code, and introduces SlowAPI as a flexible solution for FastAPI and Flask, helping backend developers reduce server load and protect APIs from abuse.
Learn how to generate cinematic ghosting effects in videos by leveraging PaddlePaddle’s PaddleHub deep learning library and the pretrained deeplabv3p_xception65 model for semantic segmentation, with step‑by‑step code, environment setup, and practical testing on classic martial‑arts footage.
This article explains the concept, syntax, and practical examples of Python decorators—including function decorators, class‑based decorators, multi‑layer decorators, and class‑as‑decorator patterns—providing clear code snippets and execution results to help readers master decorator usage.
Learn step‑by‑step how to install Miniconda on Ubuntu, transfer the installer via WinSCP, configure the base environment, avoid common pitfalls, and use essential conda commands to create, activate, deactivate, and manage Python virtual environments and packages.
The TIOBE Index for December 2020 shows C retaining the top spot while Java, Python, C++, and C# follow, highlights rapid growth for Python and several emerging languages, and presents detailed charts of top‑10 trends, other rankings, historical data, and annual award histories.
This tutorial explains how to use Python's requests, lxml, and urllib libraries to search Baidu Tieba by keyword, bypass anti‑crawling measures, extract image and video URLs with XPath, and save the media files locally, complete with code examples and screenshots.
This article introduces twelve popular open‑source Python frameworks—including Django, Tornado, Twisted, Pulsar, Bottle, Diesel, NumPy, Scrapy, Cubes, Falcon, Web2py, and Zerorpc—detailing their key features, typical use cases, and providing direct project URLs for developers seeking robust solutions.
This article introduces the fundamentals of XPath syntax, common rules, and example expressions, then explains how to use the lxml library in Python for HTML/XML parsing, including practical tips and a complete code example for extracting links and text from a sample document.
The article presents an updated, annotated image of Python 3 code that consolidates core language concepts—such as variables, control flow, functions, and basic object‑oriented usage—to help readers quickly review and reinforce their understanding of Python syntax.
This tutorial shows how to use Python to fetch data from Bilibili’s “马保国” channel via its public API, extract video metadata, clean and visualize 14,000 records, and generate insights such as top‑viewed videos and a comment word cloud.
This article introduces the powerful cross‑platform psutil module, explains how to install it, demonstrates basic commands to list processes, retrieve CPU usage, and explore various useful methods, all illustrated with clear code snippets and screenshots.
GraphScope, an open‑source one‑stop platform from Alibaba DAMO Academy, unifies interactive queries, graph analytics, and graph learning on massive, rapidly evolving graphs, offering high‑performance distributed memory management, Gremlin optimization, and seamless Python integration to tackle real‑world AI and big‑data challenges.
This guide walks you through everything needed to start automating web tests with Selenium, covering required tools, browser choices, Python installation, driver setup, essential plugins like FireBug, IDE options, and a sample script to launch Firefox and open a webpage.
Learn how to enhance Python debugging using the PySnooper library, covering quick installation, simple examples, advanced features like output redirection, variable watching, depth control, thread info, custom representations, and remote debugging tips, all illustrated with clear code snippets and screenshots.
This guide walks through setting up a Python environment, installing required libraries, capturing the Minesweeper window, extracting tile colors, converting the board into a matrix, and implementing a basic algorithm that flags mines and clicks safe squares, all automated via Win32 API calls.
This article explains the fundamentals of linear regression, including regression formulas, loss functions, and error metrics, and provides complete Python code using scikit‑learn to perform both simple and multiple linear regression on the Iris and Boston housing datasets, along with model evaluation and visualization.
This article introduces Python's built‑in time modules, explains why third‑party libraries like DateParser, Dateutil, and Arrow are needed for unconventional date formats, and demonstrates how to use them—including code examples—to split time ranges by month or week for robust data export tasks.
Although Python is slower than C, Java, or JavaScript for CPU‑intensive tasks, several projects—including PyPy, Pyston, Nuitka, Cython, and Numba—offer distinct approaches such as JIT compilation, LLVM back‑ends, or C conversion to significantly improve Python’s runtime performance.
This article explains the differences between naive and aware datetime objects, how Django sets the TZ environment variable, the behavior of datetime.now, timezone.now, and related Python functions, and provides practical guidance for storing and converting timestamps in Django applications.
This guide walks through setting up a CentOS 7 server, creating a non‑root user, installing Python 3, MySQL, and required packages, configuring a Django project, and deploying it with uWSGI behind Nginx for production use.
This guide shows how to create a custom Scrapy command to launch every spider at once, separate each spider's settings for better modularity, and resolve video download problems by adjusting request headers and handling file saving correctly.
The article surveys ten Python visualization libraries—from the classic matplotlib to newer tools like Plotly and Gleam—detailing each library’s main features, typical use cases, developer information, and where to find further documentation, helping readers choose the right tool for their data projects.
Learn how to build a Python web scraper that extracts iQIYI movie titles, actors, and scores, parses the data with regex or BeautifulSoup, displays results in a Tkinter GUI with a combobox, and saves the information to a file—all explained with code snippets and screenshots.
This article demonstrates how to crawl 6,025 Beijing Dank Apartment listings using Python, clean and enrich the data with Pandas, and visualize distribution, price, size, floor, and subway proximity through charts, revealing key market insights and correlation patterns.
This tutorial explains the fundamentals of Python logging, covering when to log, the standard log levels, simple console and file examples, multi‑module logging, variable interpolation, message formatting, date/time handling, and advanced concepts such as loggers, handlers, formatters, configuration methods, and best practices for library developers.
This article explains why identical integers and short strings may reference the same object in Python, how the small‑integer cache and string interning work, and how compilation units and constant pools affect object identity across interactive sessions and script files.
Learn how to use Python’s built-in urllib library for web requests, handling GET/POST, adding headers, managing proxies, processing cookies, handling errors, parsing URLs, and respecting robots.txt, with clear code examples and a practical case of scraping a novel site.
This article lists essential Python standard libraries and popular third‑party packages, explains their primary functions, and provides concise code examples for modules such as datetime, zlib, and sys to help developers quickly understand and apply them in their projects.
This guide shows how to create a Python 3.7 Socket.IO client script for testing socket interfaces, including installation of the python‑socketio package, handling authentication tokens with tools like Postman, and a complete example script with repository links for reference.
This article explains how to locate Weibo comment APIs, work around rate limits by using the mobile site, extract required parameters, and implement a Python script that handles cookies, pagination, emoji cleaning, deduplication, and scheduled execution to collect comments efficiently.
This guide demonstrates how to install PyMySQL, connect Python to a MySQL database, create tables, perform CRUD operations, manage transactions, and handle errors, providing complete code examples and explanations for each step.
A Tidelift analysis of over 6,000 developers reveals that JavaScript, Python, and Java dominate modern software projects, with detailed usage percentages, team size trends, and comparisons to other language rankings, offering valuable guidance for technology decisions.
This tutorial explains how to count word frequencies using Python's collections.Counter from static, random, or file‑based text sources and then visualize the results with the WordCloud library, covering code examples, parameter settings, and available colormaps.
FrankMocap, an open‑source AI algorithm from Facebook AI Research and HKU, delivers simultaneous 3D full‑body and hand pose estimation from a single monocular video, runs at about 9.5 FPS on a RTX 2080, and includes easy installation steps, code examples, and links to its GitHub repository and paper.
This article presents twenty practical Python snippets—including string reversal, title casing, unique element extraction, list repetition, comprehensions, variable swapping, splitting, joining, palindrome checking, Counter usage, anagram detection, exception handling, enumeration, memory sizing, dictionary merging, timing, flattening, random sampling, digit list conversion, and uniqueness verification—to help developers write cleaner, faster code.
This article provides a step‑by‑step guide on using Scrapy’s crawl template to automatically scrape product details such as ID, title, shop name, shop link, and price from JD.com, including source analysis, project setup, code snippets, and result verification.
This tutorial walks you through the fundamentals of sending emails with Python, covering SMTP/POP3/IMAP protocols, setting up authorization codes, establishing connections, and constructing plain‑text, HTML, image, and file attachments using the smtplib and email modules.
This article explains how to use Python's requests library and CSV handling to automate API testing of payment interfaces, focusing on correctly processing special characters in usernames and account names to ensure secure and fast transactions.
This tutorial walks you through reading Chinese GeoJSON files, converting projections, preparing scatter data, and creating a detailed map with an inset of the South China Sea using Python‑geopandas, Matplotlib, and custom legends, while also covering installation tips and known limitations.
This article traces Python’s history—from Guido van Rossum’s Dutch roots and the influence of ABC, through its 1991 birth, community‑driven growth, and design philosophy—to illustrate how open‑source collaboration shaped one of today’s most popular programming languages.
This tutorial demonstrates how to create a Python GUI image viewer and a simple computer‑vision application using PySimpleGUI, os, and OpenCV, covering layout design, element configuration, event handling, and camera integration with clear code examples and explanations.
This article provides a comprehensive guide to Neo4j, an open‑source graph database, covering its data model, key features, installation, and detailed Python usage with the Py2neo library, including node and relationship creation, property handling, subgraph operations, walkable traversals, and object‑graph mapping (OGM).
This article introduces the AI‑powered "Bringing-Old-Photos-Back-to-Life" project, explains its requirements, provides step‑by‑step commands for full‑pipeline restoration, scratch detection, global restoration, and face enhancement, and shares the Colab demo and GitHub repository for hands‑on experimentation.
This article walks through the complete process of designing a Python web scraper to collect Zhihu answer data, parse author, ID and excerpt fields, store the results in CSV files, and finally visualize the text with a word‑cloud, including all necessary code snippets and explanations.
The gRPC Core 1.34.0 release introduces numerous improvements and bug fixes across multiple language implementations, including new environment variable security support, Unix abstract socket URIs, enhanced xDS handling, updated platform compatibility, and added support for recent PHP, Python, and Ruby versions.
Learn how to use the Python Hypothesis library for property‑based testing, understand different test levels and methods, and see practical examples—including unit tests for increment/decrement functions and handling edge cases with custom examples—to write more robust, automated tests.
This article introduces Ke‑FUT, a home‑grown Flutter UI automation solution that leverages VMService and InspectorService to obtain element IDs, generates stable IDs via a custom IdGenerator, and drives view interactions through a Python‑based FUTClient, providing a low‑cost, cross‑platform testing approach for mobile apps.
This guide explains how to use Python to create custom brute‑force password dictionaries—covering simple numeric PIN lists, targeted web‑backend wordlists, and practical usage tips—for quickly cracking basic encrypted files.
musicpy is a Python library that lets developers write music using concise, theory‑based syntax, outputting MIDI files, and aims to enable AI composition through explicit music‑theory rules rather than deep‑learning, offering classes for notes, chords, scales and supporting mathematical operations on musical data.
This article presents a concise collection of thirteen practical Python snippets covering basic arithmetic, mathematical functions, random number generation, number classification, prime testing, factorials, multiplication tables, numeral system conversions, greatest common divisor, and calendar creation, each illustrated with example output images.
This article walks through using Python to crawl Tencent Video's "Offer" season 2 comments, merge and clean the CSV data, perform exploratory analysis, generate visualizations and word clouds, and apply Baidu's open‑source NLP model for sentiment scoring, providing complete code snippets for each step.
This article explains Python's two string‑formatting approaches—the C‑style % operator and the more powerful format() method—covering integer, float, and string placeholders, alignment, precision, and advanced usage with clear code examples.
This tutorial walks through Python's time and datetime modules, covering timestamps, sleep, local time, formatting, parsing, arithmetic, and the dateutil library for flexible month and year adjustments, with code examples and visual output to illustrate each concept.
This guide details the core PEP‑8 conventions for Python code, covering comments, indentation, line length, imports, whitespace, naming, and input/output practices, with clear examples and practical tips to improve readability and maintainability.
This guide walks you through setting up a Python environment, installing required libraries, constructing a FilmSky scraper class, handling pagination, parsing HTML with regex, and saving movie titles and download links, enabling you to browse and download movies from the FilmSky website efficiently.
Learn how to translate common mathematical symbols such as summation, product, factorial, conditional expressions, and matrix multiplication into clear Python code, revealing the underlying computations and helping data scientists and ML practitioners deepen their mathematical intuition through practical examples.
This article explains how Vaex, an open‑source DataFrame library, lets data scientists efficiently explore, visualize, and analyze massive datasets—such as the over‑billion‑row NYC taxi records—using memory‑mapping and virtual columns, all on a standard notebook without costly cloud resources.
This guide walks through generating word clouds from JD product reviews using Python, covering preprocessing, tokenization, frequency analysis, and visual creation with the stylecloud, wordcloud, and pyecharts libraries, including mask image selection, palette customization, and full code snippets for each method.
This guide walks you through installing, configuring, and using five Python text‑to‑speech libraries—gTTS, Baidu AIP, pyttsx3, pywin32, and speech—to generate personalized audio files, adjust voice properties, and automate playback.
Python 3.10’s second alpha introduces major enhancements such as expanded type annotations with delayed evaluation, the new ‘|’ union operator, explicit TypeAlias support, a strict mode for zip, int.bit_count() for population count, and mapping views for dictionaries, all aimed at improving code clarity and safety.
The article outlines a machine‑learning pipeline for automated captcha recognition, covering dataset generation, image preprocessing, segmentation via clustering or watershed methods, and classification using classic models and CNNs, achieving roughly 94% accuracy while noting the growing complexity of modern captchas and recommending developer collaboration when feasible.
This article explains how crawler engineers can fetch real‑time data such as sports scores, stock quotes, or cryptocurrency prices by comparing polling and WebSocket approaches, introducing the aiowebsocket library, and providing complete Python code to perform handshake, subscription, and continuous data streaming.
This tutorial walks you through setting up PyCharm to directly edit and synchronize code on a remote CentOS 7 server using SFTP, covering project path configuration, deployment settings, interpreter setup, and enabling automatic file syncing for efficient Python development.
This article explains how to set up a well‑configured CI/CD pipeline, create development‑friendly and production‑optimized Docker images for Python applications, and automate the entire workflow with Makefiles, GitHub Actions, and code‑quality tools such as CodeClimate and SonarCloud.
This article introduces Python’s sys and os modules, detailing their most useful functions for runtime configuration, file and path manipulation, process control, and environment handling, and provides clear code examples—including a simple progress bar and a demonstration of sys.argv versus __file__ behavior—to help readers master essential system programming techniques.
This article walks you through creating a Python Tkinter application that fetches a waste‑classification dataset, processes it with pandas, and provides interactive learning and testing modules so users can practice sorting recyclable, hazardous, wet, and dry waste.
Since its early 1990s debut, Python has surged ahead of many languages due to its readability and extensive libraries, yet it suffers from performance and memory drawbacks, GIL constraints, and limited mobile support, prompting a comparison with emerging languages like Julia, Rust, and Swift.
This article demonstrates how to use Python's os and shutil modules to enumerate system drives, list directory trees, delete files and folders, copy a script to the startup folder, and finally trigger a forced shutdown, illustrating a simple educational hacking tool.
This article presents ten innovative Python project ideas—from voice‑controlled GUIs and AI betting bots to trading algorithms, virtual assistants, web monitoring, SSL auto‑renewal, facial recognition, contact tracing, file management, and YouTube video aggregation—each designed to sharpen programming expertise and explore real‑world applications.
This tutorial explains how to use WeChat's template message API together with the iciba daily‑sentence service, set up a Python script on an Alibaba Cloud Linux server, configure the template in the public platform, and schedule automatic delivery via a daily cron job.
This article walks through a hands‑on experiment using Huawei Cloud RDS and Python to convert short videos into audio, extract voiceprints, and match them against a database, demonstrating how speech‑signal processing enables accurate identification of background songs in TikTok‑style clips.
This tutorial shows how to install the Python pynput library and use it to programmatically control the keyboard and mouse, enabling you to create a basic QQ message‑spamming script that can send repeated messages on both Windows and macOS platforms.
This article describes Qunar's DBA department automated migration platform, detailing its motivation, overall architecture, task pool and templates, customizable web‑based workflow, scheduling, execution queue, tooling, and the significant efficiency and reliability gains achieved across numerous database migration scenarios.
This guide shows how to package frequently used Python functions into importable modules, then demonstrates a complete script that merges multiple Excel files while preserving formatting, using pandas and standard libraries, and explains each step with screenshots and code examples.
This article walks you through creating a Python‑based voice synthesis tool using Baidu's AI platform, covering account setup, SDK installation, essential parameters, GUI design with Tkinter, code implementation, error handling, and generating audio files from custom text.
This guide demonstrates how to extract a macOS Chrome user's browsing URLs and timestamps from the History SQLite database, save them to a text file, and automatically email the file daily using Python scripts, a shell wrapper, and a crontab scheduled task.
This article introduces Python’s lambda anonymous functions, explains their syntax and differences from regular functions, showcases practical one‑line examples, explores functional programming tools like map, filter, and reduce, and highlights how lambdas can reduce code size while enhancing readability.
The article examines Python's enduring popularity, highlighting its readability, rich ecosystem, and corporate adoption while also discussing its performance drawbacks, memory usage, GIL limitation, and challenges in mobile and high‑performance computing, before comparing it to emerging languages.
This article explains how China's map is represented by three closed polygons, describes the text file format containing longitude‑latitude point groups, and provides a complete PySimpleGUI Python script to read the data and render the map as red polygons.
This article introduces eight widely used Python web scraping frameworks—including Scrapy, PySpider, Crawley, Portia, Newspaper, Beautiful Soup, Grab, and Cola—describing their main features, typical use cases, and providing links to their project repositories.
This article showcases seven intriguing code tricks—from a zero‑code deployment project and a concise shuffle algorithm to a sleep‑sort implementation, a one‑line AI chatbot, a simple next‑day timer, the legendary fast inverse square‑root constant, and the classic hello‑world example—each illustrated with brief explanations and runnable snippets.
This tutorial shows how to locate the "next page" link on a website, extract its URL using Scrapy selectors, add proper checks, and integrate the pagination logic into a Scrapy spider so that all article pages are crawled automatically.
Learn the core principles for writing effective unit tests—such as focusing on single functions, ensuring independence, and using descriptive names—alongside a concise overview of popular Python testing tools like unittest, pytest, nose, doctest, tox, and mock, to boost code reliability.
This article presents a curated list of the ten most popular Python‑related open‑source projects on GitHub in October 2023, summarizing each project's purpose, key features, and star count to help developers quickly discover valuable tools and libraries across security, web, automation, and more.
After retiring from Dropbox, Python’s creator Guido van Rossum announced he’s ending his retirement to join Microsoft’s developer division, aiming to improve Python’s performance across platforms, while the article also recounts his extensive career, awards, and the language’s origins from the ABC project.
This tutorial introduces Python fundamentals by demonstrating a Hello World program, explaining comments, covering numeric, string, tuple, list, set, and dictionary data types, and illustrating control flow constructs, loops, functions, command‑line arguments, and basic file read/write operations with clear code examples.
This article explains a Python puzzle where a list of lambda functions unexpectedly returns [6,6,6,6] due to late binding in closures, walks through the code, debugging screenshots, and clarifies how closures capture loop variables in Python.
The article recounts how Guido van Rossum, the creator of Python, retired, reflected on his next steps, and ultimately joined Microsoft’s developer team, highlighting the implications for Python’s evolution, cloud integration, and the broader open‑source ecosystem.
This tutorial explains RabbitMQ fundamentals, shows how to install the Pika client, provides complete producer and consumer Python examples, and covers advanced topics such as work queues, message acknowledgments, persistence, fair dispatch, exchanges, routing, and RPC usage.
