cross platform execution in python

cross-execution.py

# call markdown to convert markdown -> html in memory
def mkd2html(inFilename):
        #
        # and there are different ways to handle windows and unix
        # also subprocess.check_output exist in python27 only.
        #
        cmd = []
        # mostly msysgit is used, cygwin, it is win32 platform
	if sys.platform == "win32":
                # i may need to check cygwin as well
                mkdownrealpath = os.path.expanduser(cmdmarkdown)
                cmd = ["c:\\python27\\python.exe",mkdownrealpath]
        else: # unix 
                cmd = [cmdmarkdownSuSE]
        cmd.append(inFilename)  
        output = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]
        html = output.splitlines()
        return html