我为irobot-create2（https://github.com/AutonomyLab/create_autonomy）运行一个启动文件然后面临问题，我认为这与python有关。
我的环境：
-Ubuntu LS12.04
-Ros Hydro
我的日志输出：
Traceback (most recent call last):
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/__init__.py", line 279, in main
p.start()
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/parent.py", line 257, in start
self._start_infrastructure()
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/parent.py", line 206, in _start_infrastructure
self._load_config()
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/parent.py", line 121, in _load_config
self.config = roslaunch.config.load_config_default(self.roslaunch_files, self.port, verbose=self.verbose)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/config.py", line 428, in load_config_default
loader.load(f, config, verbose=verbose)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 698, in load
self._load_launch(launch, ros_config, is_core=core, filename=filename, argv=argv, verbose=verbose)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 670, in _load_launch
self._recurse_load(ros_config, launch.childNodes, self.root_context, None, is_core, verbose)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 614, in _recurse_load
self._param_tag(tag, context, ros_config, verbose=verbose)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 95, in call
return f(*args, **kwds)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/xmlloader.py", line 240, in _param_tag
value = self.param_value(verbose, name, ptype, *vals)
File "/opt/ros/hydro/lib/python2.7/dist-packages/roslaunch/loader.py", line 466, in param_value
p = subprocess.Popen(shlex.split(command), stdout=subprocess.PIPE)
File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1249, in _execute_child
raise child_exception
OSError: [Errno 8] Exec format error