電話UNIX在Python

Question

命令（不錯，renice只能）我正在做一個Python程序爲新值分配給進程和動態監視他們：

import os 
import subprocess 
#!/usr/bin/env python 
print "hello world" 
os.system("ps lx") 
print "Enter PID" 
pid = raw_input() 
print "Entered PID",pid 
print "Enter new priority" 
new = raw_input() 
print "Entered new priority is"new 
os.system("sudo renice new pid") 

我不知道該怎麼稱呼nice和renice與Python中的參數。

Answer 1

使用subprocess：

from subprocess import Popen,PIPE 

p = Popen(["sudo","-S", "renice",new , pid], stdin=PIPE, stdout=PIPE, stderr=PIPE) 
p.stdin.write("password\n") 

您也可以使用subprocess.check_call：

from subprocess import Popen, PIPE,check_call 

check_call(["ps", "lx"]) 
pid = raw_input("Enter PID") 
print "Entered PID",pid 
new = raw_input("Enter new priority") 
print "Entered new priority is",new 

p = Popen(["sudo","-S", "renice", new, pid], stdin=PIPE, stdout=PIPE, stderr=PIPE) 
p.stdin.write("pc160780\n") 
out, err = p.communicate() 

print(out if out else err)