code: def delta_angle_degrees(from_angle_degrees, to_angle_degrees):
      """Calculates the shortest signed delta angle."""
      delta = to_angle_degrees - from_angle_degrees
      return delta - 360.0 * math.floor((delta + 180.0) / 360.0)
  
file_path: lab/python/tests/utils/math_utils.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import math
label_desc: Use image node_id 4 for calling a global function with example usage: delta_angle_degrees(from_angle_degrees, to_angle_degrees) and returns: unknown