@property
def w(self):
    'Extract write lock (w) counter if available (lazy).'
    if (not self._counters_calculated):
        self._counters_calculated = True
        self._extract_counters()
    return self._w
Extract write lock (w) counter if available (lazy).
@property
def w(self):
    
    if (not self._counters_calculated):
        self._counters_calculated = True
        self._extract_counters()
    return self._w