Limit RAM usage to python program

Question

I\'m trying to limit the RAM usage from a Python program to half so it doesn\'t totally freezes when all the RAM is used, for this I\'m using the following code which is not

Answer 1

Ok so I've made some research and found a function to get the memory from Linux systems here: Determine free RAM in Python and I modified it a bit to get just the free memory available and set the maximum memory available as its half.

Code:

def memory_limit():
    soft, hard = resource.getrlimit(resource.RLIMIT_AS)
    resource.setrlimit(resource.RLIMIT_AS, (get_memory() * 1024 / 2, hard))

def get_memory():
    with open('/proc/meminfo', 'r') as mem:
        free_memory = 0
        for i in mem:
            sline = i.split()
            if str(sline[0]) in ('MemFree:', 'Buffers:', 'Cached:'):
                free_memory += int(sline[1])
    return free_memory

if __name__ == '__main__':
    memory_limit() # Limitates maximun memory usage to half
    try:
        main()
    except MemoryError:
        sys.stderr.write('\n\nERROR: Memory Exception\n')
        sys.exit(1)

The line to set it to the half is resource.setrlimit(resource.RLIMIT_AS, (get_memory() * 1024 / 2, hard)) where get_memory() * 1024 / 2 sets it to the half (it's in bytes).

Hope this can help others in future with the same matter! =)