Alert if RAM usage reaches threshold value

Threshold_Value = 70        #Value in percentage 

oper            = ">="      #Give the operator to compare

​

import os

import ctypes

import re

import operator

import sys

​

Ram_avail = []

Drive = os.environ['SYSTEMDRIVE']

GetFreeMemory = 'systeminfo | findstr /'+ Drive +'"Total Physical Memory" /'+Drive+'"Available Physical Memory"'

​

class disable_file_system_redirection:

    _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection

    _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection

    def __enter__(self):

        self.old_value = ctypes.c_long()

        self.success = self._disable(ctypes.byref(self.old_value))

    def __exit__(self, type, value, traceback):

        if self.success:

            self._revert(self.old_value)

​

def alert(arg): 

   sys.stderr.write("%d%d%d" % (arg, arg, arg)) 

​

operator_dict ={

   '>': operator.gt,

   '<': operator.lt,

   '>=': operator.ge,

   '<=': operator.le}

​

with disable_file_system_redirection():

    Run_GetFreeMemory = os.popen(GetFreeMemory).read()

    process=os.popen('tasklist /v /FI "MEMUSAGE ge 10000" | sort /+67 /R').readlines()

​

for i in [i.strip() for i in Run_GetFreeMemory.split('\n')  if i.strip()]:

    value = re.sub("\D", "", i)

    Ram_avail.append(value)

​

​

value1 = int(Ram_avail[0])

value2 = int(Ram_avail[1])

value3  = value1 - value2

value4 = float(value3)/float(value1)

value5 = value4*100

Ram_Usage = int(value5)

Ram_Mon= (operator_dict[oper](Ram_Usage,Threshold_Value))

​

if Ram_Mon is True:

    alert(1)

    print "The RAM usage reached its threshold limit \n"

    print "The given threshold is ",Threshold_Value,"Percent"

    print "The Ram usage is ", Ram_Usage,"Percent"

    print "\n"

    print 'Top RAM memory consuming processes \n'

    try:

        for i in range(1,7,1):

            print (process[i])

    except:

        pass

else:

    alert(0)

    print "The RAM usagae falls within the threshold \n "

    print "The given threshold is ",Threshold_Value,"Percent"

    print "\n"

    print "The Ram usage is ", Ram_Usage,"Percent"

    print "\n"

​