message: cleaned up py_opendrive_tests.py
diff: # https://opensource.org/licenses/MIT
  import unittest
  -# import matplotlib as mpl
  -# import matplotlib.pyplot as plt
  -from scipy.special import fresnel
  import numpy as np
  -# if os.environ.get('DISPLAY','') == '':
  -# print('no display found. Using non-interactive Agg backend')
  -# mpl.use('Agg')
  +
  +from scipy.special import fresnel
  from bark.world import *
  -from bark.world.opendrive import *
  -from bark.geometry import *
  +from bark.world.opendrive import PlanView, LaneOffset, LaneWidth, Lane, Road, fresnel_cos, fresnel_sin
  +from bark.geometry import Point2d
  class EnvironmentTests(unittest.TestCase):
  @@ -32,15 +28,13 @@ class EnvironmentTests(unittest.TestCase):
  offset = LaneOffset(1.5, 0, 0, 0)
  lane_width = LaneWidth(0.0, 59.9, offset)
  - lane = Lane.create_lane_from_lane_width(-1, pv.get_reference_line(), lane_width, 0.5)
  + lane = Lane.create_lane_from_lane_width(-1,
  + pv.get_reference_line(), lane_width, 0.5)
  - #plt.plot(lane.line.toArray()[:, 0], lane.line.toArray()[:, 1])
  print(lane)
  - lane = Lane.create_lane_from_lane_width(1, pv.get_reference_line(), lane_width, 0.5)
  + lane = Lane.create_lane_from_lane_width(
  + 1, pv.get_reference_line(), lane_width, 0.5)
  print(lane)
  - #plt.plot(lane.line.toArray()[:, 0], lane.line.toArray()[:, 1])
  - #plt.axis('equal')
  - #plt.show(block=True)
  def test_road(self):
  newRoad = Road()
  @@ -59,13 +53,10 @@ class EnvironmentTests(unittest.TestCase):
  newRoad.plan_view.add_spiral(p, 1.57079632679, 50.0, 0.0, 0.3, 0.4)
  line = newRoad.plan_view.get_reference_line().toArray()
  - #plt.plot(line[:, 0], line[:, 1])
  - #plt.axis('equal')
  - #plt.show(block=True)
  -
  def test_spiral(self):
  '''
  - spiral test compares outcome of wrapped odrSpiral implementation with scipy fresnel calculation
  + spiral test compares outcome of wrapped odrSpiral implementation with
  + scipy fresnel calculation
  '''
  # spiral using scipy
  @@ -79,11 +70,6 @@ class EnvironmentTests(unittest.TestCase):
  x_odr.append(fresnel_cos(t_i))
  y_odr.append(fresnel_sin(t_i))
  - #plt.plot(x, y)
  - #plt.plot(x_odr, y_odr, 'g')
  - #plt.axes().set_aspect("equal")
  - #plt.show()
  -
  x_odr_np = np.asarray(x_odr)
  y_odr_np = np.asarray(y_odr)
  