class_docstr: Focus width and height information into channel space, used in YOLOX.
code: def __init__(
      self,
      in_channels,
      out_channels,
      ksize=3,
      stride=1,
      bias=False,
      act="silu",
  ):
      super(Focus, self).__init__()
      self.conv = BaseConv(
          in_channels * 4,
          out_channels,
          ksize=ksize,
          stride=stride,
          bias=bias,
          act=act,
      )
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle import ParamAttr
  from paddle.regularizer import L2Decay
  from ppdet.core.workspace import register, serializable
  from ppdet.modeling.initializer import conv_init_
  from ..shape_spec import ShapeSpec
label_desc: Use image node_id 1 to create a new Focus object from inherited base classes: nn with example: obj = Focus(in_channels, out_channels, ksize, stride, bias, act)