code: def batch_l1_proj(x, eps):
      batch_size = x.size(0)
      view = x.view(batch_size, -1)
      proj_flat = batch_l1_proj_flat(view, z=eps)
      return proj_flat.view_as(x)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 19 for calling a global function with example usage: batch_l1_proj(x, eps) and returns: proj_flat