包含标签 python 的文章

Python Native Lists vs. NumPy Arrays

2021年12月22日 | Technology

This article uses small examples to compare Python lists and NumPy arrays, focusing on what they do differently in summation, products, and numeric computing workflows.……

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Hands-on Implementation of Random Forest Algorithm with Python

2020年12月28日 | Technology

This tutorial shows how to build a random forest regression workflow with Python and sklearn using Shanghai weather data, covering setup, cleaning, feature engineering, training, evaluation, and prediction.……

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Python3 Solution to LeetCode Medium Problem 468: Validate IP Address

2020年7月29日 | Technology

This guide explains how to solve LeetCode 468 in Python by combining the ipaddress module with the stricter problem-specific rules for IPv4 and IPv6.……

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Calculating the Gini Coefficient and Plotting the Lorenz Curve with matplotlib

2020年5月31日 | Technology

The Gini coefficient and Lorenz curve are widely used to represent data inequality, especially wealth inequality. However, currently in Python, there isn’t a very good function to directly plot the Lorenz curve. Since the current project requires it, this article records how to use numpy, pandas, matplotlib, and other packages to calculate the Gini coefficient and plot the Lorenz curve for practical use.……

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Using folium to Draw a COVID-19 Pandemic Map

2020年5月3日 | Technology

This guide shows how to use Python folium to build a global choropleth map from public COVID-19 data, including WHO data loading, country-code mapping, and log-based styling for better readability.……

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Application of Python Implementation of Gradient Descent in Practice

2020年1月8日 | Technology

This tutorial uses a simple quadratic function to explain the core idea of gradient descent, including the gradient direction, learning rate, stopping condition, and a step-by-step Python implementation.……

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Statistical Skew Distributions Reveal Statistical Traps in Life

2019年12月27日 | Technology

This article shows how skewed distributions can make the mean and the median tell very different stories, and why that difference often creates misleading “above average” claims in real life.……

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Decoding Xunlei Thunder Links: Python and JavaScript Conversion Examples

2019年5月17日 | Miscellaneous

This article explains the conversion rule between ordinary URLs and thunder:// Xunlei links, and gives both Python and JavaScript examples for encoding and decoding.……

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Longest Palindromic Substring Algorithm - Manacher

2019年3月28日 | Technology

This article explains Manacher’s algorithm for the longest palindromic substring problem, including the transformed string idea and the Len array that allow it to run in $O(n)$ time.……

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Finding Common Values in Two Python Lists

2019年3月8日 | Technology

This article compares several common ways to find shared values between two Python lists and explains which methods remove duplicates and which ones preserve list order.……

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Detailed Examples of Seaborn Plotting Kernel Density Curves

2019年1月20日 | Technology

In a frequency distribution histogram, when the sample size is sufficiently enlarged to its limit, and the bin width is infinitely shortened, the step-like broken line in the frequency histogram will evolve into a smooth curve. This curve is called the density distribution curve of the population.

This article walks through how to use Seaborn with the Iris dataset in Pandas to plot several common kinds of kernel density curves.

1. Basic Density Curve

    import seaborn as sns
    import pandas as pd
    sns.set(color_codes=True)
    sns.set_style("white")
    df = pd.read_csv('iris.csv')
    sns.kdeplot(df['sepal_width'])

‘Detailed Examples of Seaborn Plotting Kernel Density Curves’

To plot a kernel density curve using Seaborn, you only need to use kdeplot. Note that a density curve only requires one variable; here we choose the sepal_width column.

2. Density Curve with Shading

    import seaborn as sns
    import pandas as pd
    sns.set(color_codes=True)
    sns.set_style("white")
    df = pd.read_csv('iris.csv')
    sns.kdeplot(df['sepal_width'], fill=True)

‘Detailed Examples of Seaborn Plotting Kernel Density Curves’

In recent Seaborn versions, fill=True is the clearer way to draw the shaded area.

……

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Python Implementation for Kugou Music MP3 Download

2019年1月13日 | Technology

After implementing python for Qianqian Music mp3 download, some users found that many songs couldn’t be searched on Qianqian Music. So today, Chunjian Muke extended the download functionality to Kugou Music, with source code provided.

Using the same approach, first search for a song directly on the Kugou official website. Then, open the network monitor in Google Chrome and search for the same keyword again. You’ll then be able to find the API information (Note: It’s best to view the network requests during the second search to filter out unnecessary information).

1. Analyzing Search API Information

《Python Implementation for Kugou Music MP3 Download》 With only 4 network requests, it’s easy to identify that the first request genuinely returns song information, so we can construct this request.