code: def download_czang16(download_to, username=None):
      wgets = [
          f"wget --user={username} --password=czeng -P {download_to} http://ufallab.ms.mff.cuni.cz/~bojar/czeng16-data/data-plaintext-format.{i}.tar"
          for i in range(10)
      ]
      cmds = []
      for i, cmd in enumerate(wgets):
          filename = f"{download_to}/data-plaintext-format.{i}.tar"
          if os.path.exists(filename):
              print(f"{filename} has already been downloaded; so skip")
              continue
          cmds.append(cmd)
      if cmds and username is None:
          raise ValueError(
              "No czeng username is given; please register at http://ufal.mff.cuni.cz/czeng/czeng16 to obtain username to download"
          )
      for cmd in cmds:
          call(cmd)
      print("done with downloading czeng1.6")
  
imports: from typing import NamedTuple, List
  from urllib.parse import urlparse
  import os, sys
  import subprocess
  from subprocess import check_call, check_output
  import glob
  import wget
  import re
  import multiprocessing
  from functools import partial
  import pathlib
  from collections import OrderedDict
label_desc: Use image node_id 30 for calling a global function with example usage: download_czang16(download_to, username) without return types