Year: 2025

Practical Data Analysis with Python: Uncovering Millions in E-commerce Sales Data

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Practical Data Analysis with Python: Uncovering Millions in E-commerce Sales Data

Practical Data Analysis with Python: Uncovering Millions in E-commerce Sales Data 1. Case Background: Annual Sales Data from an E-commerce Platform Dataset: 2024 All-Platform Order Data (Simulated) Order ID, User ID, Product Category, Unit Price, Quantity, Payment Time, City Dataset Size: 500,000 orders, 200,000 users, 1000+ SKUs Analysis Goals: Identify high-potential products, optimize marketing strategies, … Read more

Overview of Text and Byte Sequences in Python

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Overview of Text and Byte Sequences in Python

★ This chapter will discuss the following topics:Character, code point, and byte representationUnique features of binary sequences such as bytes, bytearray, and memoryviewCodecs for all Unicode and legacy character setsAvoiding and handling encoding errorsBest practices for handling text filesTraps of default encoding and issues with standard I/ONormalizing Unicode text for safe comparisonUtility functions for normalization, … Read more

Understanding the Differences Between Single Quotes, Double Quotes, and Triple Quotes in Python

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Understanding the Differences Between Single Quotes, Double Quotes, and Triple Quotes in Python

The differences between single quotes, double quotes, and triple quotes in Python: 1. Single quotes (‘) and double quotes (” )： • Functionally identical：Both are used to define single-line strings and can be used interchangeably. • Selection criteria：Primarily based on the type of quotes contained within the string to avoid using escape characters. • If … Read more

Summary of Basic Knowledge for Python Beginners

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Summary of Basic Knowledge for Python Beginners

0. Prerequisites 1. Common Data Types NOTICE 1.1 Numerical Operations NOTICE 1.2 Strings 1.3 Indexing and Slicing 1.4 Lists 1.5 Tuples 1.6 Dictionaries 1.7 Sets 2. Control Flow 2.1 if 2.2 while 2.3 for with range/zip/enumerate 3. Functions 4. Input and Output (Standard Input and Output) 5. File Operations 6. Packages 7. Classes 8. Exception … Read more

Evaluation of Python Development Tools: A Comparison of Poetry Dependency Management vs Traditional pip

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Evaluation of Python Development Tools: A Comparison of Poetry Dependency Management vs Traditional pip

1. Brief Introduction This article will delve into the Python dependency management tool Poetry and provide a comprehensive comparison with the traditional pip. Dependency management is a critical aspect of Python project development, and a good dependency management tool can effectively resolve issues such as version conflicts, environment isolation, and project packaging and deployment. Whether … Read more

Complete Guide to Python Matplotlib: The Art of Visualization from Basic Plots to Advanced Techniques

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Complete Guide to Python Matplotlib: The Art of Visualization from Basic Plots to Advanced Techniques

Complete Guide to Python Matplotlib: The Art of Visualization from Basic Plots to Advanced Techniques 1. Data Visualization: The “Visual Language” of Telling Stories with Charts An excellent chart is worth a thousand lines of data—Matplotlib, as the cornerstone of Python visualization, can transform dull numbers into intuitive insights. This article will guide you from … Read more

Understanding the List Data Type in Python

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Understanding the List Data Type in Python

In Python, a list is a built-in data type used to store an ordered, mutable collection of elements. Lists are very flexible and can store any type of object, allowing for a mix of multiple data types, and the number of elements can be increased or decreased at any time. 1. Defining and Creating Lists … Read more

Calculating Distance Between Any Two Latitude and Longitude Points Using Python

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Calculating Distance Between Any Two Latitude and Longitude Points Using Python

Ellipsoids Ellipsoid is a three-dimensional shape in geometry formed by rotating an ellipse around its major or minor axis. The shape of the Earth is not a perfect sphere but is closer to a flattened sphere, hence referred to as the “Earth ellipsoid.” Specifically, the Earth is slightly bulging at the equator and slightly flattened … Read more

A Comprehensive Guide to Python Lists: From Beginner to Expert

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A Comprehensive Guide to Python Lists: From Beginner to Expert

In the Python programming language, a list is a very basic and important data structure. It allows us to store a sequence of ordered elements, which can be of any type, including numbers, strings, other lists, etc. Python’s lists provide a flexible way to organize and manipulate data. 1. Creating Lists Lists can be created … Read more

Python Sets: The Invisible Powerhouse in Data Processing

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Python Sets: The Invisible Powerhouse in Data Processing

The first time I truly experienced the power of sets was while working on a user behavior analysis project for a social networking site. As I stared at the progress bar on the screen, my heart raced—I had to deduplicate 15 million user browsing records in real-time and detect abnormal behaviors. Using a list? The … Read more