@property
def numYields(self):
    'Extract numYields counter if available (lazy).'
    if (not self._counters_calculated):
        self._counters_calculated = True
        self._extract_counters()
    return self._numYields
Extract numYields counter if available (lazy).
@property
def numYields(self):
    
    if (not self._counters_calculated):
        self._counters_calculated = True
        self._extract_counters()
    return self._numYields