code: def read_files(pattern):
      return [read_file(fname) for fname in glob.glob(pattern)]
  
imports: import re
  import string
  import glob
  from gensim import utils
  from gensim.parsing.porter import PorterStemmer
label_desc: Use image node_id 17 for calling a global function with example usage: read_files(pattern) and returns: unknown