AttributeError: 'module' object has no attribute

import numpy as np

import cv2

from matplotlib import pyplot as plt

imgL = cv2.imread('l.png',0)

imgR = cv2.imread('r.png',0)

stereo = cv2.StereoBM_create(numDisparities=16, blockSize=15)

disparity = stereo.compute(imgL,imgR)

plt.imshow(disparity,'gray')

plt.show()  

try to use this code is your using the code from open-cv documentation

You are getting the example from the trunk (aka devel) documentation. if you aren't using trunk version, try to find an example for your correct version.

Use this function instead

stereo = cv2.StereoBM(cv2.STEREO_BM_BASIC_PRESET,ndisparities=16, SADWindowSize=15)

You can find documentation for this function here

cv2.StereoBM_create(numDisparities=16, blockSize=15)

Try it. My opencv version is 3.2.

If you want to find any function working in opencv, you can try this

1. import(cv2)
2. help(cv2)