问在node js中设置env变量，并在python脚本中使用

EN

but getting error throw err;
        ^

Error: KeyError: 'data'
    at PythonShell.parseError (H:\NodeJS\node_modules\python-shell\index.js:184:17)
    at terminateIfNeeded (H:\NodeJS\node_modules\python-shell\index.js:98:28)
    at ChildProcess.<anonymous> (H:\NodeJS\node_modules\python-shell\index.js:89:9)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:198:12)
    ----- Python Traceback -----
    File "script.py", line 5, in <module>
      print(os.environ["data"])
    File "C:\Program Files\Anaconda3\lib\os.py", line 725, in __getitem__
      raise KeyError(key) from None

var PythonShell = require('python-shell');
var myPythonScriptPath = './script.py';
var pyshell = new PythonShell(myPythonScriptPath);


pyshell.on('message', function (message) {
    // received a message sent from the Python script (a simple "print" statement)
    console.log(message);
});

// end the input stream and allow the process to exit
pyshell.end(function (err) {
    if (err){
        throw err;
    };

    console.log('finished');
});