class_docstr: Channel attention module.
code: def __init__(self, channels):
      super().__init__()
  
      self.channels = channels
      self.gamma = self.create_parameter(
          shape=[1],
          dtype="float32",
          default_initializer=nn.initializer.Constant(0),
      )
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg.cvlibs import manager
  from paddleseg.models import layers
  from paddleseg.utils import utils
label_desc: Use image node_id 1 to create a new CAM object from inherited base classes: nn with example: obj = CAM(channels)