code: def masked_fill(x, mask, value):
      y = paddle.full(x.shape, value, x.dtype)
      return paddle.where(mask, y, x)
  
imports: import copy
  import math
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 3 for calling a global function with example usage: masked_fill(x, mask, value) and returns: paddle