将Python脚本连接到Nodejs

将Python脚本连接到Nodejs,python,node.js,Python,Node.js,完成Node.js的新功能。最近,我收到一个任务,用python从web上抓取一个网站,并使用Node.js中的python shell包将python脚本连接到Node.js。我已经完成了刮削部分,但对Node.js没有任何先验知识。您能指导我如何解决这个问题吗?因为您必须使用python shell包,并且假设您的源文件是my_file.py,您只需阅读 import {PythonShell} from 'python-shell'; let pyshell = new PythonShe

完成Node.js的新功能。最近,我收到一个任务,用python从web上抓取一个网站,并使用Node.js中的python shell包将python脚本连接到Node.js。我已经完成了刮削部分,但对Node.js没有任何先验知识。您能指导我如何解决这个问题吗?

因为您必须使用
python shell
包,并且假设您的源文件是
my_file.py
,您只需阅读

import {PythonShell} from 'python-shell';
let pyshell = new PythonShell('my_script.py'); // 1
 
pyshell.on('message', function (message) {
  // received a message sent from the Python script (a simple "print" statement)
  console.log(message); // here there will be logged your pyoutput
}); // 2
 
// end the input stream and allow the process to exit
pyshell.end(function (err,code,signal) {
  if (err) throw err;
  console.log('The exit code was: ' + code);
  console.log('The exit signal was: ' + signal);
  console.log('finished');
  console.log('finished');
}); // 3
此脚本的作用:

  • 启动不带参数的python脚本
  • 获取pyscript的stdoutput上的所有写入操作,并将其记录到nodejs stdout中
  • 关闭报告一些可选信息的python脚本
  • 如果您的脚本将webscrape记录到标准输出中,这应该可以正常工作

    import sys 
    # Takes first name and last name via command 
    # line arguments and then display them 
    print("Output from Python") 
    print("First name: " + sys.argv[1]) 
    print("Last name: " + sys.argv[2]) 
    
    # save the script as hello.py 
    
    // import express JS module into app 
    // and creates its variable. 
    var express = require('express'); 
    var app = express(); 
    
    // Creates a server which runs on port 3000 and 
    // can be accessed through localhost:3000 
    app.listen(3000, function() { 
        console.log('server running on port 3000'); 
    } ) 
    
    // Function callName() is executed whenever 
    // url is of the form localhost:3000/name 
    app.get('/name', callName); 
    
    function callName(req, res) { 
    
        // Use child_process.spawn method from 
        // child_process module and assign it 
        // to variable spawn 
        var spawn = require("child_process").spawn; 
    
        // Parameters passed in spawn - 
        // 1. type_of_script 
        // 2. list containing Path of the script 
        // and arguments for the script 
    
        // E.g : http://localhost:3000/name?firstname=Mike&lastname=Will 
        // so, first name = Mike and last name = Will 
        var process = spawn('python',["./hello.py", 
                                req.query.firstname, 
                            req.query.lastname] ); 
    
        // Takes stdout data from script which executed 
        // with arguments and send this data to res object 
        process.stdout.on('data', function(data) { 
            res.send(data.toString()); 
        } ) 
    } 
    
    //将代码另存为start.js

    保存Python脚本和服务器脚本代码后,通过以下命令从其源文件夹运行代码:

    node start.js

    通过以下链接访问应用程序:

    localhost:3000/name?firstname=“输入名字”&lastname=“输入姓氏”


    例如:localhost:3000/name?firstname=Ram&lastname=Sharma

    您需要对python程序的输出做什么?我想向本地服务器显示已删除的内容。或者可能有帮助。另外,如果您可以共享您尝试过的代码,那就更好了。通常您会提供示例python脚本,然后尝试为其他人编写节点脚本,以帮助您完成实现。顺便说一句,
    pythonshell
    npm
    上不存在,您的意思是说
    pythonshell