老师们好：我按照书上41页安装pandas，就是一直安不上，而且检查出来一堆错误代码：

"C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\resolution\resolvelib\candidates.py", line 317, in _prepare_distribution

      return self._factory.preparer.prepare_linked_requirement(

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\operations\prepare.py", line 508, in prepare_linked_requirement

      return self._prepare_linked_requirement(req, parallel_builds)

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\operations\prepare.py", line 550, in _prepare_linked_requirement

      local_file = unpack_url(

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\operations\prepare.py", line 239, in unpack_url

      file = get_http_url(

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\operations\prepare.py", line 102, in get_http_url

      from_path, content_type = download(link, temp_dir.path)

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\network\download.py", line 157, in __call__

      for chunk in chunks:

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\cli\progress_bars.py", line 152, in iter

      for x in it:

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_internal\network\utils.py", line 62, in response_chunks

      for chunk in response.raw.stream(

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_vendor\urllib3\response.py", line 576, in stream

      data = self.read(amt=amt, decode_content=decode_content)

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_vendor\urllib3\response.py", line 512, in read

      with self._error_catcher():

    File "D:\360Downloads\lib\contextlib.py", line 153, in __exit__

      self.gen.throw(typ, value, traceback)

    File "C:\Users\netwo\AppData\Local\Temp\pip-standalone-pip-nwk490et\__env_pip__.zip\pip\_vendor\urllib3\response.py", line 443, in _error_catcher

      raise ReadTimeoutError(self._pool, None, "Read timed out.")

  pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.

  WARNING: You are using pip version 21.1.2; however, version 21.3 is available.

  You should consider upgrading via the 'D:\培训资料\venv\Scripts\python.exe -m pip install --upgrade pip' command.

   比这个多了多，我也看不懂。然后直接找到快速示例1，也不能运行。请问大神们怎么回事？？？？