JavaScript调用Python脚本后Matplotlib绘图窗口无法自动关闭

数据老陈

2026-8-1

Matplotlib绘图窗口调用plt.close('all')无法自动关闭

我编写了JavaScript脚本open_hist_w_user.js，通过spawn启动Python进程并将数据传递给create_histogram.py脚本。该Python脚本使用Matplotlib库生成并显示直方图，但调用plt.close('all')后绘图窗口仍无法关闭。我期望直方图生成后延迟一段时间自动关闭窗口，此前尝试用Plotly和df3将代码迁移到JavaScript但未成功，因此采用控制台传递数据的方式。

代码

JavaScript脚本：open_hist_w_user.js

/**
 * This script is used to spawn a python process that generates a histogram for the specified username.
 * 
 * @param {string} username - The username for which the histogram is being generated.
 * 
 * @returns {ChildProcess} - The spawned python process.
 */

const { spawn } = require('child_process');
const username = 'some_username';
const pythonProcess = spawn('python', ['./create_histogram.py', username]);

Python脚本：create_histogram.py

import matplotlib.pyplot as plt
import sys
import time

def create_histogram(username):
    """
    This function creates a histogram of data, with a specified number of bins and range, and displays it.

    Parameters
    ----------
    username : str
        The username for which the histogram is being generated.

    Returns
    -------
    None
    """
    plt.close('all')  # close any previous plot windows

    # plot the histogram
    plt.clf()  # clear the previous plot
    plt.hist([1, 2, 3, 4, 5], bins=3, range=(0, 5))
    plt.xlabel('Total')
    plt.ylabel('Frequency')
    plt.title(f'Histogram of Total Column for {username}')
    plt.show()  # show the plot
    time.sleep(5)  # wait for 5 seconds
    plt.close('all')  # close the plot window
if __name__ == "__main__":
    username = sys.argv[1]
    create_histogram(username)