Node.js与pythonshell通信

Question

我在nodejs中有json数据。我尝试将这些数据传递给python。 但我无法从PythonFIle得到回复

jsonData格式

[
    {
        id: 123,
        option: ["A","B"],
        description: "Why I can't pass this data to Python" 
    },
    {
        id: 456,
        option: ["A","B"],
        description: "Why I can't pass this data to Python" 
    },{....}
]

node.js

var { PythonShell } = require('python-shell'); 
let pyshell = new PythonShell('../pythonFile.py', { mode: 'json ' }); 
pyshell.send(jsonData)
pyshell.on('message', function (message) { //But never receive data from pythonFile.
        console.log("HIHI, I am pythonFile context") //Not appear this message
        console.log(message); //Not appear this message
    });
pyshell.end(function (err) { // Just run it
        if (err)  throw err;
        console.log('finished'); //appear this message
    });

pythonFile.py

import json
import sys

jsJSONdata = input() //recieve js data

print(jsJSONdata) //send jsJSONdata to nodejs

谢谢你的帮助

Answer 1

首先，您不能通过send（）方法发送JSON变量，因为此方法发送到只接受字符串和字节的stdin。 请尝试执行我的示例：

test.py

value = input()

print(f"Python script response: {value}")

test.js

const {PythonShell} = require('python-shell')

const pyshell = new PythonShell('test.py');

pyshell.send(JSON.stringify({"hello": "hello"}));

pyshell.on('message', function (message) {
  console.log(message);
});

pyshell.end(function (err,code,signal) {
  if (err) throw err;
  console.log('finished');
});

如果这个例子适合您，那么将{"hello": "hello"}更改为jsonData

我希望我能帮助你