Add HER on sac (#85)

* Add HER on sac

* Add args in wandb log

scripts/envs/open_manipulator/open_manipulator_reacher_env.py

@@ -1,9 +1,9 @@
 #! usr/bin/env python
 
-import numpy as np
-
 import gym
+import numpy as np
 from gym.utils import seeding
+
 from ros_interface import (
     OpenManipulatorRosGazeboInterface,
     OpenManipulatorRosRealInterface,

scripts/envs/open_manipulator/ros_interface.py

@@ -6,6 +6,8 @@ from math import cos, sin
 
 import gym
 import numpy as np
+
+import rospkg  # noqa
 import rospy  # noqa
 import tf  # noqa
 import tf.transformations as tr  # noqa
@@ -17,8 +19,6 @@ from sensor_msgs.msg import JointState
 from std_msgs.msg import Float64
 from urdf_parser_py.urdf import URDF  # noqa
 
-import rospkg  # noqa
-
 
 class OpenManipulatorRosBaseInterface(object):
     """Open Manipulator Interface based on ROS."""