python psutil跨平台监控系统或进程信息(CPU,mem)

psutil is a cross-platform library for retrieving information onrunning processes and system utilization (CPU, memory,
disks, network)in Python.
https://pypi.python.org/pypi/psutil

#!/usr/bin/python
#coding=utf-8

import sys
import psutil

def main(process_name):
list_mem = []
list_cpu = []
max_mem = 0
max_cpu = 0
ave_mem = 0
ave_cpu = 0

try:
while True:
try:
for p in psutil.process_iter():
if p.name() == process_name:
#print p.memory_info()
mem = p.memory_info()[0]#rss, 可参考help(psutil._pswindows.pmem)
cpu = p.cpu_percent(interval=1)
print cpu
list_mem.append(mem)
list_cpu.append(cpu)
except psutil.NoSuchProcess:
continue
except KeyboardInterrupt:
print ">>>KeyboardInterrupt"

total_mem = 0
total_cpu = 0
for mem in list_mem:
total_mem += mem
if mem > max_mem:
max_mem = mem
ave_mem = total_mem/len(list_mem)

for cpu in list_cpu:
total_cpu += cpu
if cpu > max_cpu:
max_cpu = cpu
ave_cpu = total_cpu/len(list_cpu)

print max_mem/1024, ave_mem/1024
print max_cpu, ave_cpu

if __name__ == '__main__':
main(sys.argv[1])