Dronekit

[prash319]

I am using a Raspberry Pi to control the Pixhawk. I just started using the dronekit. I am working on the 'Hello Drone' script and I am stuck in the starting stages.

print ( "Start simulator (SITL)" )
Start simulator (SITL)
import dronekit_sitl.start_default()
_SyntaxError: invalid syntax
sitl = dronekit_sitl.start_default()
Traceback (most recent call last):
File "<pyshell#2>", line 1, in
sitl = dronekit_sitl.start_default()
NameError: name 'dronekit_sitl' is not defined
import dronekit_sitl
sitl = dronekit_sitl.start_default()
Starting copter simulator (SITL)
SITL already Downloaded and Extracted.
Ready to boot.
T_raceback (most recent call last):
File "<pyshell#4>", line 1, in
sitl = dronekit_sitl.start_default()
File "/usr/local/lib/python3.4/dist-packages/dronekit_sitl/init.py", line 341, in start_default
sitl.launch(sitl_args, await_ready=True, restart=True)
File "/usr/local/lib/python3.4/dist-packages/dronekit_sitl/init.py", line 271, in launch
p = Popen([self.path] + args, cwd=wd, shell=sys.platform == 'win32', stdout=PIPE, stderr=PIPE)
File "/usr/lib/python3.4/subprocess.py", line 859, in init
restore_signals, start_new_session)
File "/usr/lib/python3.4/subprocess.py", line 1457, in execute_child
raise child_exception_type(errno_num, err_msg)
OSError: [Errno 8] Exec format error

Why am I getting this error? How do I solve it?

I tried setting up SITL as shown in this link.
http://ardupilot.org/dev/docs/setting-up-sitl-on-linux.html
But when i try it, the systems restarts.

Can someone please tell me how to solve this?
Thanks.