code: def vector_slope(vec):
      assert len(vec) == 2
      return abs(vec[1] / (vec[0] + 1e-8))
  
imports: import cv2
  import numpy
  from numpy.fft import fft
  from numpy.linalg import norm
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: vector_slope(vec) and returns: abs