code: def gaussian_blur(tens: Tensor, ksize: int, sigma=0) -> Tensor:
      # When sigma=0, it is computed as `sigma = 0.3*((ksize-1)*0.5 - 1) + 0.8`
      return cv.GaussianBlur(tens, ksize=(ksize, ksize), sigmaX=sigma)
  
imports: import cv2
  import numpy
  from ..coreten import Tensor
label_desc: Use image node_id 2 for calling a global function with example usage: gaussian_blur(tens, ksize, sigma) and returns: cv