erro in cod

[MichellPinheiro]

hey,

I'm working with python and i use the dlib , opencv library but when i put this cod show me an error, this is a cod that i use:

import the necessary packages

from imutils import face_utils

import dlib

import cv2

initialize dlib's face detector (HOG-based) and then create

the facial landmark predictor

p = "shape_predictor_68_face_landmarks.dat"

detector = dlib.get_frontal_face_detector()

predictor = dlib.shape_predictor(p)

load the input image and convert it to grayscale

image = cv2.imread("example.jpg")

gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

detect faces in the grayscale image

rects = detector(gray, 0)

loop over the face detections

for (i, rect) in enumerate(rects):

determine the facial landmarks for the face region, then

convert the facial landmark (x, y)-coordinates to a NumPy

array

shape = predictor(gray, rect)

shape = face_utils.shape_to_np(shape)

loop over the (x, y)-coordinates for the facial landmarks

and draw them on the image

for (x, y) in shape:

cv2.circle(image, (x, y), 2, (0, 255, 0), -1)

show the output image with the face detections + facial landmarks

cv2.imshow("Output", image)

cv2.waitKey(0)

e da-me erro quando introduzi

predictor = dlib.shape_predictor(p)

the error is

Unable to open shape_predictor_68_face_landmarks.dat

someone can help me?