"""
Module for cv2 utility functions and maintaining version compatibility
between 3.x and 4.x
"""
import cv2
def findContours(*args, **kwargs):
"""
Wraps cv2.findContours to maintain compatiblity between versions
3 and 4
Returns:
contours, hierarchy
"""
if cv2.__version__.startswith('4'):
contours, hierarchy = cv2.findContours(*args, **kwargs)
elif cv2.__version__.startswith('3'):
_, contours, hierarchy = cv2.findContours(*args, **kwargs)
else:
raise AssertionError(
'cv2 must be either version 3 or 4 to call this method')
return contours, hierarchy
