class_docstr: Residual in Residual Dense Block
code: def __init__(self, nf, gc=32):
      super(RRDB, self).__init__()
      self.RDB1 = ResidualDenseBlock_5C(nf, gc)
      self.RDB2 = ResidualDenseBlock_5C(nf, gc)
      self.RDB3 = ResidualDenseBlock_5C(nf, gc)
  
imports: import functools
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 1 to create a new RRDB object from inherited base classes: nn with example: obj = RRDB(nf, gc)