import cv2
import numpy as np
img = np.zeros((512, 512, 3), np.uint8)
img = cv2.line(img, (0, 256), (512, 256), (255, 0, 0), 10)
img = cv2.ellipse(img,(256,256),(50,50),180,0,180,(255, 255, 0),-1)
img = cv2.ellipse(img,(256,256),(50,50),0,0,180,(0, 255, 0),-1)
img = cv2.circle(img, (256, 256), 56, (0, 0, 255), 10)
img = cv2.rectangle(img, (189, 189), (323, 323), (0, 255, 0), 10)
pts = np.array([[10,5],[20,30],[70,20],[50,10]], np.int32)
pts = pts.reshape((-1,1,2))
img = cv2.polylines(img,[pts],True,(0,255,255))
font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img,'OpenCV',(10,500), font, 4,(255,255,255),2,cv2.LINE_AA)
cv2.namedWindow('image', cv2.WINDOW_NORMAL)
cv2.imshow('image', img)
cv2.waitKey(0)
cv2.destroyAllWindows()