python获取centos系统剩余内存方法总结

#!/usr/bin/env python
memfile = open('/proc/meminfo')
while True:
mem = memfile.readline()
if 'MemTotal' in mem:
print '%s' % mem,
if 'MemFree' in mem:
print '%s' % mem,
break
memfile.close()

#!/usr/bin/env python
memfile = open('/proc/meminfo')
i = 0
while i<2:
i+=1
mem = memfile.readline()
print "%s" % mem,
memfile.close()

#!/usr/bin/env python
#coding=utf8
memfile = open('/proc/meminfo')
i = 0
while i<2:
mem = memfile.readline()
memnum = mem.split()[1]
if i == 0:
print "内存总量为：%s" % memnum
else:
print "剩余内存为：%s" % memnum
i+=1
memfile.close()

#!/usr/bin/env python
with open('/proc/meminfo') as fd:
for line in fd:
if line.startswith('MemTotal'):
total = line.split()[1]
continue
if line.startswith('MemFree'):
free = line.split()[1]
break
FreeMem = int(free)/1024.0
TotalMem = int(total)/1024.0
print "FreeMem:"+"%.2f" % FreeMem+'M'
print "TotalMem:"+"%.2f" % TotalMem+'M'
print "FreeMem/TotalMem:"+"%.2f" % ((FreeMem/TotalMem)*100)+'%'