human
Solve the following python programming problem given the following code:
def _remove_old_enough_file(self, base_file, maxage, remove_sig = True, remove_lock = True) : 
    'Remove a single swap or base file if it is old enough.' 
    (exists, age) = self._get_age_of_file (self) 
    if (not exists) : 
        return 
lock_file = os.path.split (base_file) [(- 1)] 
    @ utils.synchronized (lock_file, external = True, lock_path = self.lock_path) 
    def _inner_remove_old_enough_file() : 
        (exists, age) = self._get_age_of_file (base_file) 
        if ((not exists) or (age < maxage)) : 
            return 
LOG.info (_LI ('Removing base or swap file: %s'), base_file) 
        try : 
            os.remove (base_file) 
            if remove_sig : 
                signature = get_info_filename (base_file) 
                if os.path.exists (signature) : 
                    os.remove (signature) 
except OSError as e : 
            LOG.error (_LE ('Failed to remove %(base_file)s, error was %(error)s'), { 
                'base_file' : base_file, 
                'error' : e, 
}) 
if (age < maxage) : 
        LOG.info (_LI ('Base or swap file too young to remove: %s'), base_file) 
else : 
        _inner_remove_old_enough_file () 
        if remove_lock : 
            try : 
                lockutils.remove_external_lock_file (lock_file, lock_file_prefix = 'nova-', lock_path = self.lock_path) 
except OSError as e : 
                LOG.debug ('Failed to remove %(lock_file)s, error was %(error)s', { 
                    'lock_file' : lock_file, 
                    'error' : e, 
}) 

    
    

    Fix the buggy line: (exists, age) = self._get_age_of_file (self)
assistant
#Here is Python program to fix the buggy line: (exists, age) = self.

(exists, age) = self._get_age_of_file (base_file)