add ARS to train/eval Minitaur

examples/pybullet/gym/pybullet_envs/ARS/start_ars_servers.py

@@ -0,0 +1,28 @@
+"""TODO(jietan): DO NOT SUBMIT without one-line documentation for start_ars_servers.
+
+blaze build -c opt //experimental/users/jietan/ARS:start_ars_servers
+blaze-bin/experimental/users/jietan/ARS/start_ars_servers
+
+TODO(jietan): DO NOT SUBMIT without a detailed description of start_ars_servers.
+"""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+import time
+import subprocess
+from absl import app
+from absl import flags
+
+FLAGS = flags.FLAGS
+flags.DEFINE_integer("num_servers", 8, "number of servers")
+
+def main(argv):
+  del argv  # Unused.
+  for server_id in xrange(FLAGS.num_servers):
+    args = ["blaze-bin/experimental/users/jietan/ARS/ars_server", "--config_name=MINITAUR_GYM_CONFIG", "--server_id={}".format(server_id), "--run_on_borg=False"]
+    subprocess.Popen(args)
+
+
+if __name__ == '__main__':
+  app.run(main)