我想在colab中运行this tutorial。
但是，当我尝试导入一堆模块时：

import io
import torch
from torchtext.utils import download_from_url
from torchtext.data.utils import get_tokenizer
from torchtext.vocab import build_vocab_from_iterator

它给出了extract_archive和build_vocab_from_iterator的错误：

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-5-a24e72502dbc> in <module>()
      1 import io
      2 import torch
----> 3 from torchtext.utils import download_from_url, extract_archive
      4 from torchtext.data.utils import get_tokenizer
      5 from torchtext.vocab import build_vocab_from_iterator

ImportError: cannot import name 'extract_archive'

ImportError                               Traceback (most recent call last)
<ipython-input-4-02a401fd241b> in <module>()
      3 from torchtext.utils import download_from_url
      4 from torchtext.data.utils import get_tokenizer
----> 5 from torchtext.vocab import build_vocab_from_iterator
      6 
      7 url = 'https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-v1.zip'

ImportError: cannot import name 'build_vocab_from_iterator'

请帮我处理一下这个。