code: def from_config(cls, cfg, input_shape):
      return {
          "in_channels": [i.channels for i in input_shape],
      }
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from ppdet.core.workspace import register, serializable
  from ppdet.modeling.layers import DropBlock
  from ppdet.modeling.ops import get_act_fn
  from ..backbones.darknet import ConvBNLayer
  from ..shape_spec import ShapeSpec
  from ..backbones.csp_darknet import BaseConv, DWConv, CSPLayer
label_desc: Use image node_id 3 for calling the PPYOLOFPN obj's underlying member method code with example usage: obj.from_config(cls, cfg, input_shape) and returns: dict