@property
def namespace(self):
    'Extract namespace if available (lazy).'
    if (not self._operation_calculated):
        self._operation_calculated = True
        self._extract_operation_and_namespace()
    return self._namespace
Extract namespace if available (lazy).
@property
def namespace(self):
    
    if (not self._operation_calculated):
        self._operation_calculated = True
        self._extract_operation_and_namespace()
    return self._namespace