SYMBOL INDEX (4 symbols across 3 files)

FILE: edgedetect/canny_01.py
  function sobel (line 9) | def sobel(img, k):

FILE: edgedetect/contour_01.py
  function sobel (line 15) | def sobel(image):
  function counting_penguins (line 30) | def counting_penguins(sobel, image):

FILE: edgedetect/contourapprox.py
  function edge (line 10) | def edge(image):