在python中实现调用可执行文件.exe的3种方法

import os 
main = "project1.exe"
r_v = os.system(main) 
print (r_v )

import subprocess 
import os 
main = "project1.exe"
if os.path.exists(main): 
  rc,out= subprocess.getstatusoutput(main) 
  print (rc)
  print ('*'*10)
  print (out)

import os
main = "project1.exe"
f = os.popen(main)  
data = f.readlines()  
f.close()  
print (data)