code: def mldata_filename(dataname):
      """Convert a raw name for a data set in a mldata.org filename."""
      dataname = dataname.lower().replace(" ", "-")
      return re.sub(r"[().]", "", dataname)
  
file_path: catboost/contrib/python/scikit-learn/py2/sklearn/datasets/mldata.py
imports: import os
  from os.path import join, exists
  import re
  import numbers
  import numpy
  import scipy
  from scipy import io
  from shutil import copyfileobj
  from .base import get_data_home, Bunch
label_desc: Use image node_id 1 for calling a global function with example usage: mldata_filename(dataname) and returns: re