TypeError: PythonShell is not a constructor at Class.python_start (/home/pi/MagicMirror/modules/MMM-Facial-Recognition/node_helper.js:11:21)

[akashpbhardwaj]

The training is working fine but the Module doesnot works when used in config.js
Please check the issue !

Here is the Log :
npm start

magicmirror@2.4.1 start /home/pi/MagicMirror
sh run-start.sh

Starting MagicMirror: v2.4.1
Loading config ...
Loading module helpers ...
Initializing new module helper ...
Module helper loaded: MMM-Facial-Recognition
Initializing new module helper ...
Module helper loaded: MMM-OnScreenMenu
No helper found for module: MMM-SimpleLogo.
Initializing new module helper ...
Check MagicMirror version for node helper 'MMM-CoinMarketCap' - Minimum version: 2.2.1 - Current version: 2.4.1
Version is ok!
Module helper loaded: MMM-CoinMarketCap
No helper found for module: alert.
Initializing new module helper ...
Module helper loaded: updatenotification
No helper found for module: clock.
Initializing new module helper ...
Module helper loaded: calendar
No helper found for module: compliments.
No helper found for module: currentweather.
No helper found for module: weatherforecast.
No helper found for module: MMM-google-route.
Initializing new module helper ...
Module helper loaded: newsfeed
No helper found for module: MMM-connection-status.
All module helpers loaded.
Starting server on port 8080 ...
Server started ...
Connecting socket for: MMM-Facial-Recognition
Starting module helper: MMM-Facial-Recognition
Connecting socket for: MMM-OnScreenMenu
Connecting socket for: MMM-CoinMarketCap
MMM-CoinMarketCap: module loaded! Path: /home/pi/MagicMirror/modules/MMM-CoinMarketCap
MMM-CoinMarketCap: Path "/logos" configured successfully.
Connecting socket for: updatenotification
Connecting socket for: calendar
Starting node helper for: calendar
Connecting socket for: newsfeed
Starting module: newsfeed
Sockets connected & modules started ...
Launching application.
Whoops! There was an uncaught exception...
TypeError: PythonShell is not a constructor
at Class.python_start (/home/pi/MagicMirror/modules/MMM-Facial-Recognition/node_helper.js:11:21)
at Class.socketNotificationReceived (/home/pi/MagicMirror/modules/MMM-Facial-Recognition/node_helper.js:40:14)
at Socket. (/home/pi/MagicMirror/modules/node_modules/node_helper/index.js:113:11)
at emitTwo (events.js:126:13)
at Socket.emit (events.js:214:7)
at /home/pi/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickCallback (internal/process/next_tick.js:180:9)
MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues
MMM-CoinMarketCap: Socket Notification Received: "INIT".
MMM-CoinMarketCap: Socket Notification Received: "GET_LISTINGS".
Create new calendar fetcher for url: http://www.calendarlabs.com/ical-calendar/ics/33/India_Holidays.ics - Interval: 300000
Create new news fetcher for url: http://www.nytimes.com/services/xml/rss/nyt/HomePage.xml - Interval: 300000
MMM-CoinMarketCap: Socket Notification Received: "GET_CURRENCY_DETAILS".
MMM-CoinMarketCap: Socket Notification Received: "GET_CURRENCY_DETAILS".
MMM-CoinMarketCap: Socket Notification Received: "GET_CURRENCY_DETAILS".
MMM-CoinMarketCap: Socket Notification Received: "GET_CURRENCY_DETAILS".

2nd The config file
var config = {
address: "localhost", // Address to listen on, can be:
// - "localhost", "127.0.0.1", "::1" to listen on loopback interface
// - another specific IPv4/6 to listen on a specific interface
// - "", "0.0.0.0", "::" to listen on any interface
// Default, when address config is left out, is "localhost"
port: 8080,
ipWhitelist: ["127.0.0.1", "::ffff:127.0.0.1", "::1"], // Set [] to allow all IP addresses
// or add a specific IPv4 of 192.168.1.5 :
// ["127.0.0.1", "::ffff:127.0.0.1", "::1", "::ffff:192.168.1.5"],
// or IPv4 range of 192.168.3.0 --> 192.168.3.15 use CIDR format :
// ["127.0.0.1", "::ffff:127.0.0.1", "::1", "::ffff:192.168.3.0/28"],

language: "en",
timeFormat: 24,
units: "metric",

modules: [

{
module: 'MMM-Facial-Recognition',
config: {
// 1=LBPH | 2=Fisher | 3=Eigen
recognitionAlgorithm: 1,
lbphThreshold: 50,
fisherThreshold: 250,
eigenThreshold: 3000,
// force the use of a usb webcam on raspberry pi (on other platforms this is always true automatically)
useUSBCam: false,
// Path to your training xml
trainingFile: 'modules/MMM-Facial-Recognition/training.xml',
// recognition intervall in seconds (smaller number = faster but CPU intens!)
interval: 2,
// Logout delay after last recognition so that a user does not get instantly logged out if he turns away from the mirror for a few seconds
logoutDelay: 15,
// Array with usernames (copy and paste from training script)
users: ['Akash', 'None'],
//Module set used for strangers and if no user is detected
defaultClass: "default",
//Set of modules which should be shown for every user
everyoneClass: "everyone",
// Boolean to toggle welcomeMessage
welcomeMessage: true
}
},
{
module: 'MMM-OnScreenMenu',
position: 'bottom_right',
/* Valid positions: 'top_right', 'top_left', 'bottom_right', 'bottom_left' */
config: {
touchMode: true,
enableKeyboard: true,
// ... see more options below
}
}
]

};

/*************** DO NOT EDIT THE LINE BELOW ***************/
if (typeof module !== "undefined") {module.exports = config;}

Other modules are also there but i think no need to show here as the error in the log is from Face recognition module

[PimDietzenbacher]

Same problem. How did you solve this????

[dimitrystd]

Me too. JIC

MagicMirror: v2.4.1
Python: 2.7.13
Node: 9.11.2
NPM: 6.4.1

[JooMiHyun]

i also have same problem. How did you solve this?

[ejwessel]

+1 having this issue

Edit:
I googled around for the error regarding PythonShell is not a constructor and came across:
extrabacon/python-shell#154

It suggests using curly brackets around PythonShell
const {PythonShell} = require("python-shell");

[shayfer]

I have tried that as well but now I get a new error.

SyntaxError: Unexpected token T in JSON at position 0
at JSON.parse ()
at PythonShell.asJson (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:350:21)
at /home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:302:42
at Array.forEach ()
at PythonShell.recieveInternal (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:298:15)
at PythonShell.receiveStderr (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:282:21)
at Socket. (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:100:18)
at emitOne (events.js:116:13)
at Socket.emit (events.js:211:7)
at addChunk (_stream_readable.js:263:12)
{ Error: ImportError: No module named 'cv2'
at PythonShell.parseError (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:232:21)
at terminateIfNeeded (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:121:32)
at ChildProcess. (/home/pi/MagicMirror/modules/MMM-Motion-Detection/node_modules/python-shell/index.js:113:13)
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 "modules/MMM-Motion-Detection/motiondetection/motiondetection.py", line 19, in
import cv2
traceback: 'Traceback (most recent call last):\n File "modules/MMM-Motion-Detection/motiondetection/motiondetection.py", line 19, in \n import cv2\nImportError: No module named 'cv2'\n',
executable: 'python3',
options: null,
script: 'modules/MMM-Motion-Detection/motiondetection/motiondetection.py',
args:
[ '{"useUSBCam":false,"interval":1,"motionStopDelay":120,"detectionThreshold":1000,"turnOffDisplay":true}' ],
exitCode: 1 }

[nater303]

• Open node_helper.js
  var option = {pythonPath: 'python'}
  const pyshell = new PythonShell('modules/' + this.name + '/facerecognition/facerecognition.py', option, { mode: 'json', args: [JSON.stringify(this.config)]});

[nosee818]

• Open node_helper.js
  var option = {pythonPath: 'python'}
  const pyshell = new PythonShell('modules/' + this.name + '/facerecognition/facerecognition.py', option, { mode: 'json', args: [JSON.stringify(this.config)]});

Do you mean add var options? It does not work for me. :(

[roudaille]

same issue over here. Same node_helper.js tested with MMM-Facial-Recognition-OCV3 is working fine.

[fpdrozd]

Hi, I installed an older version of python-shell (0.4.0 - released 3 years ago) and it works without modifying the node_helper.js file. There had to be some breaking changes.

[Sumrag]

Hi, I installed an older version of python-shell (0.4.0 - released 3 years ago) and it works without modifying the node_helper.js file. There had to be some breaking changes.

Hi! How did you install an older version of python shell to make the MMM-Facial-Recognition work?

[Sumrag]

I have tried that as well but now I get a new error.
Where you able to solve the issue? My output is the same as yours when I insert the curly brackets.

[fpdrozd]

@Sumrag You can install this specific version of python-shell by this command:
npm install python-shell@0.4.0

(npm docs reference)