Merge remote-tracking branch 'bp/master'

examples/pybullet/gym/pybullet_envs/__init__.py

@@ -1,4 +1,10 @@
-from gym.envs.registration import registry, register, make, spec
+import gym
+from gym.envs.registration import registry, make, spec
+def register(id,*args,**kvargs):
+	if id in  registry.env_specs:
+		return
+	else:
+		return gym.envs.registration.register(id,*args,**kvargs)
 
 # ------------bullet-------------