code: def swish(x):
      return x * F.sigmoid(x)
  
imports: import copy
  import math
  import numpy
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from medicalseg.cvlibs import manager
  from medicalseg.utils import load_pretrained_model
label_desc: Use image node_id 1 for calling a global function with example usage: swish(x) and returns: unknown