code: def readline(n):
      from itertools import islice
  
      f = open("pythran/tests/rosetta/read_conf.cfg")
      linelist = list(islice(f, n, n + 1))
      assert linelist != [], "Not " + str(n) + " lines in file"
      line = linelist[0]
      f.close()
      return line
  
label_desc: Use image node_id 1 for calling a global function with example usage: readline(n) and returns: line