python在linux系统下获取系统内存使用情况，pythonlinux,＂＂＂Simple mo

python在linux系统下获取系统内存使用情况，pythonlinux,"""Simple mo

"""Simple module for getting amount of memory used by a specified user'sprocesses on a UNIX system.It uses UNIX ps utility to get the memory usage for a specified username andpipe it to awk for summing up per application memory usage and return the total.Python's Popen() from subprocess module is used for spawning ps and awk."""import subprocessclass MemoryMonitor(object):    def __init__(self, username):        """Create new MemoryMonitor instance."""        self.username = username    def usage(self):        """Return int containing memory used by user's processes."""        self.process = subprocess.Popen("ps -u %s -o rss | awk '{sum+=$1} END {print sum}'" % self.username,                                        shell=True,                                        stdout=subprocess.PIPE,                                        )        self.stdout_list = self.process.communicate()[0].split('\n')        return int(self.stdout_list[0])

                                将上面的代码保存为：memorymonitor.py

调用方法如下：

from memorymonitor import MemoryMonitormemory_mon = MemoryMonitor('username')used_memory = memory_mon.usage()