AttributeError: module ‘cv2‘ has no attribute ‘xfeatures2d‘

解决方法：

1.降低opencv-python的版本

pip install opencv-python==3.4.2.16 -i https://pypi.doubanio.com/simple/

pip install opencv-contrib-python==3.4.2.16 -i https://pypi.doubanio.com/simple/

2.更改函数名称

sift = cv2.xfeatures2d.SIFT_create()

改为:

sift = cv2.SIFT_create()