py调用cmd命令

def execFormatCmd(cmd):
cmd = cmd.replace('\\', '/')
cmd = re.sub('/+', '/', cmd)
#     print cmd
ret = 0
if platform.system() == "Windows":
st = subprocess.STARTUPINFO
st.dwFlags = subprocess.STARTF_USESHOWWINDOW
st.wShowWindow = subprocess.SW_HIDE
s = subprocess.Popen(cmd, shell=True)
ret = s.wait()
if ret:
s = subprocess.Popen(cmd, stdout=subprocess.PIPE , stderr=subprocess.PIPE, shell=True)
stdoutput, erroutput = s.communicate()

log_utils.error("*******ERROR*******")
log_utils.error(stdoutput)
log_utils.error(erroutput)
log_utils.error("*******************")
cmd = 'error::' + cmd + '  !!!exec Fail!!!  '
else:

s = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
stdoutput, erroutput = s.communicate()
cmd += ' !!!exec success!!! '
log_utils.warning(cmd)

return ret