class_docstr: A high level game controller class.
  
  The class allows interacting with DMLab environment using high level actions,
  such as look at specific direction, move to specific coordinates etc.
class_docstr_tok: ["A","high","level","game","controller","class",".","The","class","allows","interacting","with","DMLab","environment","using","high","level","actions",",","such","as","look","at","specific","direction",",","move","to","specific","coordinates","etc","."]
code: def _rotation_speed(self, delta_angle, steps=10):
      start = self.orientation
      target = np.array([start[0], start[1] + delta_angle, 0.0])
  
      if math_utils.angles_within_tolerance(self.orientation, target):
          return 0.0
  
      return math_utils.calculate_speed(_FPS, start, target, steps)[1]
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import six
  from python.tests.utils import math_utils
label_desc: Use image node_id 16 for calling the GameController obj's underlying member method code with example usage: obj._rotation_speed(delta_angle, steps) and returns: math_utils, int