code: def masked_fill(x, mask, value):
      mask = mask.astype(x.dtype)
      return x * paddle.logical_not(mask).astype(x.dtype) + mask * value
  
imports: import copy
  import math
  import paddle
  from paddle import nn
  from paddle.nn import functional
label_desc: Use image node_id 1 for calling a global function with example usage: masked_fill(x, mask, value) and returns: unknown