human
Solve the following python programming problem given the following code:
def cpustats() : 
    "
    Return the CPU stats for this minion

    CLI Example:

    .. code-block:: bash

        salt '*' status.cpustats
    " 
    def linux_cpustats() : 
        '
        linux specific implementation of cpustats
        ' 
        procf = '/proc/stat' 
        if (not os.path.isfile (procf)) : 
            return { 
                
} 
stats = salt.utils.fopen (procf, 'r').read ().splitlines () 
        ret = { 
            
} 
        for line in stats : 
            if (not line) : 
                continue 
comps = line.split () 
            if (comps [0] == 'cpu') : 
                ret [comps [0]] = { 
                    'idle' : _number (comps [4]), 
                    'iowait' : _number (comps [5]), 
                    'irq' : _number (comps [6]), 
                    'nice' : _number (comps [2]), 
                    'softirq' : _number (comps [7]), 
                    'steal' : _number (comps [8]), 
                    'system' : _number (comps [3]), 
                    'user' : _number (comps [1]), 
} 
else : 
                if (comps [0] == 'intr') : 
                    ret [comps [0]] = { 
                        'total' : _number (comps [1]), 
                        'irqs' : [_number (x) for x in comps [2 :]], 
} 
else : 
                    if (comps [0] == 'softirq') : 
                        ret [comps [0]] = { 
                            'total' : _number (comps [1]), 
                            'softirqs' : [_number (x) for x in comps [2 :]], 
} 
else : 
                        ret [comps [0]] = _number (comps [1]) 
return ret 
def freebsd_cpustats() : 
        '
        freebsd specific implementation of cpustats
        ' 
        vmstat = __salt__ ['cmd.run'] ('vmstat -P').splitlines () 
        vm0 = vmstat [0].split () 
        cpu0loc = vm0.index ('cpu0') 
        vm1 = vmstat [1].split () 
        usloc = vm1.index ('us') 
        vm2 = vmstat [2].split () 
        cpuctr = 0 
        ret = { 
            
} 
        for cpu in vm0 [cpu0loc :] : 
...
    
    Given the code above, what is a proper replacement for <MASK>?
assistant
#Here is a proper replacement for <MASK>.
def freebsd_cpustats(