使用python-shell在node和Python之間交換資料

我正在嘗試學習如何在 Node 和 Python 之間交換資料python-shell，在 git repo 上，他們有一些示例代碼：

借用其中的一些代碼，這是app.js：

import {PythonShell} from 'python-shell';

let options = {
  mode: 'text',
  args: ['get_time()', 'get_weekday()']
};

PythonShell.run('my_script.py', options, function (err, results) {
  if (err) throw err;
  // results is an array consisting of messages collected during execution
  console.log('results: %j', results);
});

這是my_script.py下面將只列印作業日和當前時間：

from datetime import datetime

# Create datetime object
date = datetime.now()

# Get the weekday value, as an integer
date.weekday()

# Define a list of weekday names
days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']


def get_weekday():  
    return days[date.weekday()]


def get_time():
    return datetime.now().time()

#print(get_time())
#print(get_weekday())

運行時app.js會拋出錯誤：

(node:15380) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
(Use `node --trace-warnings ...` to show where the warning was created)
Uncaught c:\Users\bbartling\Desktop\javascript\stout\test_SO\app.js:1
import {PythonShell} from 'python-shell';
^^^^^^

SyntaxError: Cannot use import statement outside a module
No debugger available, can not send 'variables'
Process exited with code 1

有什么想法可以嘗試嗎？感謝您的任何提示，這里沒有太多智慧。我可以通過在 Python 腳本上呼叫這些函式python-shell嗎？只是想知道我是否可以在這個python-shell包中使用 Javascript從 Python 中檢索當前作業日或當前時間。

uj5u.com熱心網友回復：

替換import {PythonShell} from 'python-shell';為let {PythonShell} = require('python-shell');

編輯：在 .py 檔案中，import sys然后從 nodejs 傳遞的引數將sys.argv作為陣列可用。我想通過放置 if 檢查你可以呼叫特定的函式，最后你在 python 中列印的任何內容都可以results在 js 中使用

樣本：

.py 檔案：

import sys

def log():  
    print('hello from python')
    
if sys.argv[1][0]=="1":
    log()

.js 檔案：

let { PythonShell } = require("python-shell");

let options = {
  mode: "text",
  args: "1",
};

PythonShell.run("my_script.py", options, function (err, results) {
  if (err) throw err;
  // results is an array consisting of messages collected during execution
  console.log("results: %j", results);
});

uj5u.com熱心網友回復：

感謝@sandeep.kgp讓我開始這里是一個完整的答案，這要歸功于python-shell的YouTube 視頻的幫助。下面的代碼只是來回傳遞一些值，用 2 個不同的 python 包檢查當前時間。

應用程式.js

let {PythonShell} = require("python-shell");

let options = {
  mode: "text",
  args: ["datetime","time"],
};

PythonShell.run("my_script.py", options, function (err, results) {
  if (err){
    console.log(err)
    console.log("An error happened")
  }else{
      // results is an array consisting of messages collected during execution
    console.log("results: ", results);
    console.log("Python Script Finished");
    }
})

my_script.py

import sys, time
from datetime import datetime


date = datetime.now()
today = date.today()
today.strftime("%d/%m/%Y")


def use_datetime():  
    print("Using datetime package its: ", today)


def use_time():
    print("Using the time package its: ", time.ctime())


try:
    for arg in sys.argv:
        #print(arg)
            
        if arg == "time":
            use_time()

        elif arg == "datetime":
            use_datetime()

        else:
            print("An arg passed: ", arg)

except Exception as error:
    print(f"Error: {str(error)}") 

標籤：Python 节点.js

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