code: def write_transform(transform, filename):
      
      filename = os.path.expanduser(filename)
      libfn = utils.get_lib_fn('writeTransform%s' % (transform._libsuffix))
      libfn(transform.pointer, filename)
docs: Write ANTsTransform to file
  
      ANTsR function: `writeAntsrTransform`
  
      Arguments
      ---------
      transform : ANTsTransform
          transform to save
  
      filename : string
          filename of transform (file extension is ".mat" for affine transforms)
      
      Returns
      -------
      N/A
  
      Example
      -------
      >>> import ants
      >>> tx = ants.new_ants_transform(dimension=2)
      >>> tx.set_parameters((0.9,0,0,1.1,10,11))
      >>> ants.write_transform(tx, '~/desktop/tx.mat')
      >>> tx2 = ants.read_transform('~/desktop/tx.mat')