code: def spline(input_dim, **kwargs):
      """
      A helper function to create a
      :class:`~pyro.distributions.transforms.Spline` object for consistency with
      other helpers.
  
      :param input_dim: Dimension of input variable
      :type input_dim: int
  
      """
  
      # TODO: A useful heuristic for choosing number of bins from input
      # dimension like: count_bins=min(5, math.log(input_dim))?
      return Spline(input_dim, **kwargs)
  
imports: from functools import partial
  import torch
  import torch.nn
  import torch.nn.functional
  from torch.distributions import Transform, constraints
  from pyro.nn import DenseNN
  from ..conditional import ConditionalTransformModule
  from ..torch_transform import TransformModule
  from ..util import copy_docs_from
label_desc: Use image node_id 5 for calling a global function with example usage: spline(input_dim) and returns: Spline