After sharing about<span>Pydantic</span>, I’m back to learning<span>Python</span> with a focus on<span>__name__</span> and <span>__main__</span>. Why discuss this? Isn’t it just a line of code written below the executed file? 1 if if __name__ == '__main__' Have you ever been confused about why the code block below this line in the called file does not execute? But … Read more
Learning Python 1. Pre-learning Highlights Design a dialog box between two good friends using Python’s PyQt module, where messages sent by both parties can be displayed in each other’s area. The previous PyQt implementation for “Learning Management” used a database for storage. This time, we will use a file to record the dialogue information. As … Read more
Beginner → Intermediate → Specialized Breakthrough → Practical Application 1. Beginner Stage (1-2 weeks) Goal: Master basic syntax and be able to write simple scripts.Learning Content: Environment Setup: Install Python (recommended 3.8+), PyCharm/VSCode, Jupyter Notebook. Basic Syntax: Variables, data types (integers, strings, lists, dictionaries), operators, conditional statements (<span>if-else</span>), loops (<span>for/while</span>). Functions and Modules: Define functions, … Read more
Chapter 10: Files and Data Formatting As the scale of programs increases, we no longer only deal with temporary data in memory, but need to save data for the long term or share it across programs. Files are the most basic means of data persistence and an important bridge for Python to communicate with the … Read more
🐍 Comprehensive Analysis of Python Collection Data Types and Conditional Statements Python provides various collection data types, each with its unique characteristics and applicable scenarios. This article will comprehensively introduce the four collection types: lists, tuples, sets, and dictionaries, as well as the use of conditional statements in Python. 1. Python Collection Data Types Python … Read more
1. Founding Time and Authors Founding Time：The concept of UUID (Universally Unique Identifier) was first proposed by Apollo Computer in the 1980s, and the standardized version of UUID was formally defined in RFC 4122 published by Paul J. Leach and Rich Salz in July 1998. Core Designers： Paul J. Leach：Microsoft engineer, expert in distributed systems … Read more
Code output demonstration Multiple color schemes Code explanation Part One Library imports and font settings # =========================================================================================# ====================================== 1. Environment Setup =======================================# =========================================================================================import numpy as np import pandas as pd import matplotlib.pyplot as plt from matplotlib.patches import Polygon from scipy.stats import gaussian_kde, ttest_1samp import matplotlib.patches as mpatches import os plt.rcParams['font.family'] = 'serif' plt.rcParams['font.serif'] = ['Times … Read more
#python #accounting #opencv #computer visionI will introduce an interesting application of Python based oncomputer vision using OpenCVOpenCV can not only recognize hands but also be used in various scenarios such as artificial intelligence, exam proctoring, and more.The program for dual hand tracking and gesture recognition uses the OpenCV and cvzone libraries todetect hands in real-time … Read more
01 Introduction In our daily work, we often need to execute system commands, which requires the use of the subprocess library. However, there are places where we use subprocess.run and others where we use subprocess.Popen. What are the differences between these two? What is their relationship? Today, we will analyze this issue. subprocess is a … Read more
We have previously organized a lot of learning materials related to Python web scraping, including mind maps, basic knowledge points, and common issues. However, theoretical knowledge is always somewhat superficial; only through practical experience can one truly master the knowledge points. Therefore, the Python practical project exercises are here! This resource covers content from basic … Read more