python - running an external program (executable) with param

#__author__:: john kesh mahugu johnmahugu at gmail
# running an external program (executable) with parameter with python
program = 'myprogramname.exe'
arguments = ('safe', 'normal', 'debug')
argument = raw_input('Enter your argument: ')
if argument in arguments:
  subprocess.call([program, argument])
else:
  print('Illegal Argument')
'''
Hi I am trying to automate a command line program.
The exe file take one argument to run.
Example myprogramname.exe (say mode options are safe, normal or debug)
to run in debug mode I simply type this in the command line:
C:\source>myprogramname debug
How do I write python program to run this ztac.exe file taking the different modes as inputs?
'''#