class_docstr: RCNN accuracy. 
code: def __init__(self):
      super(RCNNAccMetric, self).__init__("RCNNAcc")
  
imports: import mxnet
label_desc: Use image node_id 1 to create a new RCNNAccMetric object from inherited base classes: mx.metric with example: obj = RCNNAccMetric()