Question

我正在制作一个Python程序，为流程分配新值并动态监控它们：

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")

我不知道如何使用Python中的参数调用nice和renice。

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)

在Python中调用UNIX命令（nice，renice）

1 个答案: