check memory details via python script on mac os x

#!/usr/bin/python

import subprocess

import re

# Get process info

ps = subprocess.Popen(['ps', '-caxm', '-orss,comm'], stdout=subprocess.PIPE).communicate()[0]

vm = subprocess.Popen(['vm_stat'], stdout=subprocess.PIPE).communicate()[0]

# Iterate processes

processLines = ps.split('\n')

sep = re.compile('[\s]+')

rssTotal = 0 # kB

for row in range(1,len(processLines)):

    rowText = processLines[row].strip()

    rowElements = sep.split(rowText)

    try:

        rss = float(rowElements[0]) * 1024

    except:

        rss = 0 # ignore...

    rssTotal += rss

# Process vm_stat

vmLines = vm.split('\n')

sep = re.compile(':[\s]+')

vmStats = {}

for row in range(1,len(vmLines)-2):

    rowText = vmLines[row].strip()

    rowElements = sep.split(rowText)

    vmStats[(rowElements[0])] = int(rowElements[1].strip('\.')) * 4096

print 'Wired Memory:\t\t%d MB' % ( vmStats["Pages wired down"]/1024/1024 )

print 'Active Memory:\t\t%d MB' % ( vmStats["Pages active"]/1024/1024 )

print 'Inactive Memory:\t%d MB' % ( vmStats["Pages inactive"]/1024/1024 )

print 'Free Memory:\t\t%d MB' % ( vmStats["Pages free"]/1024/1024 )

print 'Real Mem Total (ps):\t%.3f MB' % ( rssTotal/1024/1024 )

MacBook-Pro-Marek:python marek$ python sys.py 

Wired Memory: 2239 MB

Active Memory: 6772 MB

Inactive Memory: 4624 MB

Free Memory: 1433 MB

Real Mem Total (ps): 8770.777 MB