如何从方法返回Task <T>？

Question

请考虑代码：

import numpy as np
import cv2

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

cap = cv2.VideoCapture("faces4.mp4")

while 1:
ret, img = cap.read()
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)

for (x,y,w,h) in faces:
    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)


  fullbody = fullbody_cascade.detectMultiScale(roi_gray)
  for (ax,ay,aw,ah) in fullbody:
        cv2.rectangle(roi_color,(ax,ay),(ax+aw,ay+ah),(0,255,0),2)



    cv2.imshow('img',img)
    k = cv2.waitKey(30) & 0xff
    if k == 27:
         break

      cap.release()
      cv2.destroyAllWindows()

其主要内容：

public class TestResource<T>
{
        public Task<T> Get()
        {
            String measures = null;
            // Some heavy action that put data in "measures"

            // now return Task<T> with "measures" for T="Measure" ...
            return measures as Task<T>;  // alwsys returns null ...
        }
}

TestResource<Measure> testMeasure = new TestResource<Measure>(); Task<Measure> taskMeasure = testMeasure.Get(); Measure result = taskMeasure.Result; // !! This one is ALWAYS NULL if (result != null) { // Show result to the user } 始终为NULL。

我们如何从taskMeasure方法中正确返回Task<T>（具有所请求T的正确值）？