Function not implemented. Reinstall the library with support for Windows, GTK + 2.x or Carbon

Question

I am trying to work with opencv on mac to identify a person, but keep getting this error message:

The function is not implemented. Rebuild the library with 
Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian,
install libgtk2.0-dev and pkg-config, then re-run cmake or configure
script in function cvShowImage

I am using python for mac osx and installing opencv using pip. Does anyone have experience with this error, and if so, how did you fix it?

Here is my code:

import numpy as np
import cv2

face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')

img = cv2.imread('/william.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

faces = face_cascade.detectMultiScale(gray, 1.3, 5)

for (x, y, w, h) in faces:
    img = cv2.rectangle(img, (x, y), (x+w, y+h), (255, 0, 0), 2)
    roi_gray = gray[y:y+h, x:x+w]
    roi_color = img[y:y+h, x:x+w]
    eyes = eye_cascade.detectMultiScale(roi_gray)
    for (ex, ey, ew, eh) in eyes:
        cv2.rectangle(roi_color, (ex, ey), (ex+ew, ey+eh), (0, 255, 0), 2)

cv2.imshow('img', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

Answer 1

Try these steps:

1. Check the DIR where you install the opencv libc files

   print(cv2.getBuildInformation())
   

2. Recompile it using instructions on Linux (or another on the official website)

3. Copy the files from the "build / bin" recompilation directory to your DIR, where your previous opencv is located.