code: def loadmat(path):
      r
      data = pkgutil.get_data('pygsp', 'data/' + path + '.mat')
      data = io.BytesIO(data)
      return scipy.io.loadmat(data)
docs: r"""
      Load a matlab data file.
  
      Parameters
      ----------
      path : string
          Path to the mat file from the data folder, without the .mat extension.
  
      Returns
      -------
      data : dict
          dictionary with variable names as keys, and loaded matrices as
          values.
  
      Examples
      --------
      >>> from pygsp import utils
      >>> data = utils.loadmat('pointclouds/bunny')
      >>> data['bunny'].shape
      (2503, 3)