How to monitor CPU and RAM usage using Python

I want to monitor the CPU and RAM usage using Python,

Now, I know how to monitor RAM usage by Python

from ctypes import *
from ctypes.wintypes import *

class MEMORYSTATUS(Structure):
_fields_ = [
('dwLength', DWORD),
('dwMemoryLoad', DWORD),
('dwTotalPhys', DWORD),
('dwAvailPhys', DWORD),
('dwTotalPageFile', DWORD),
('dwAvailPageFile', DWORD),
('dwTotalVirtual', DWORD),
('dwAvailVirtual', DWORD),
]
def winmem():
m = MEMORYSTATUS()
windll.kernel32.GlobalMemoryStatus(byref(m))
return m
m = winmem()
print '%d MB physical RAM left.' % (m.dwAvailPhys/1024**2)

But I don't know how to monitor CPU realtime usage, please help me.

And how to monitor CPU and RAM used by one program?

while i am not much into ctypes, there's another way, using WMI
check MSDN and here for more.

one example :
another eg:

Now I knew how to monitor CPU and Memory usage via win32pdh, while I don't know how to monitor memory usage of one application.

snippet of code:
These code only can monitor the whole availabe memory, I do not know how to change the CounterPath to monitor one certain application's memory usage.

anyone can help me, thanks for your reply

while i am not much into ctypes, there's another way, using WMI
check MSDN and here for more.

one example :

Expand|Select|Wrap|Line Numbers

1. >>> import wmi
2. >>> wm = wmi.WMI()
3. >>> for j in wm.Win32_PerfFormattedData_PerfOS_Memory(): print j 
4.  

another eg:

Expand|Select|Wrap|Line Numbers

1. >>> import wmi
2. >>> wm = wmi.WMI ()
3. >>> for j in wm.Win32_Processor (): print j
4.  

Great link GD! Would you consider doing an article or code post for one of the sub forums. This is something that I had not heard of. Thanks for the info.

Hi,
I want to use Ctypes to monitor RAM on UNIX, what can i do ?

thanks for your help.

hicham

i think that ctypes is not supported under unix platforms. i cant found, how to get informations about memory, and i think for each platforme, it must use the apropriate command:
exp :
linux ==> use /proc/meminfo
unix ==> use for each platforme its command

i want to use one methode to get memory informations for all platforms, please if any one can help,

thanks