Creating your own contour in opencv using python

Question

I have a set of boundary points of an object.

I want to draw it using opencv as contour.

I have no idea that how to convert my points to contour representation.

Answer 1

To add to Cherif KAOUA's answer, I found I had to convert to list and zip my numpy array. Reading in an array of points from a text file:

  contour = []
  with open(array_of_points,'r') as f:
      next(f) // line one of my file gives the number of points
      for l in f:
          row = l.split()
          numbers = [int(n) for n in row]
          contour.append(numbers)

  ctr = np.array(contour).reshape((-1,1,2)).astype(np.int32)
  ctr = ctr.tolist()
  ctr = zip(*[iter(ctr)]*len(contour))