code: def coord_diff(x, y):
      return (x[0] - y[0], x[1] - y[1])
  
imports: from __future__ import division
  import re
  from decimal import Decimal
  from math import ceil, cos, floor, log10, pi, sin
label_desc: Use image node_id 26 for calling a global function with example usage: coord_diff(x, y) and returns: unknown,  unknown