Collecting tldextract==2.2.2
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/fd/0e/9ab599d6e78f0340bb1d1e28ddeacb38c8bb7f91a1b0eae9a24e9603782f/tldextract-2.2.2-py2.py3-none-any.whl (48 kB)
     |████████████████████████████████| 48 kB 19 kB/s 
Collecting tornado==5.1.1
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/e6/78/6e7b5af12c12bdf38ca9bfe863fcaf53dc10430a312d0324e76c1e5ca426/tornado-5.1.1.tar.gz (516 kB)
     |███████▋                        | 122 kB 17 kB/s eta 0:00:23ERROR: Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pip/_internal/cli/base_command.py", line 216, in _main
    status = self.run(options, args)
  File "/usr/lib/python2.7/site-packages/pip/_internal/cli/req_command.py", line 182, in wrapper
    return func(self, options, args)
  File "/usr/lib/python2.7/site-packages/pip/_internal/commands/install.py", line 325, in run
    reqs, check_supported_wheels=not options.target_dir
  File "/usr/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 183, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "/usr/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 388, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/usr/lib/python2.7/site-packages/pip/_internal/resolution/legacy/resolver.py", line 340, in _get_abstract_dist_for
    abstract_dist = self.preparer.prepare_linked_requirement(req)
  File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 469, in prepare_linked_requirement
    hashes=self._get_linked_req_hashes(req)
  File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 259, in unpack_url
    hashes=hashes,
  File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 130, in get_http_url
    link, downloader, temp_dir.path, hashes
  File "/usr/lib/python2.7/site-packages/pip/_internal/operations/prepare.py", line 282, in _download_http_url
    for chunk in download.chunks:
  File "/usr/lib/python2.7/site-packages/pip/_internal/cli/progress_bars.py", line 168, in iter
    for x in it:
  File "/usr/lib/python2.7/site-packages/pip/_internal/network/utils.py", line 88, in response_chunks
    decode_content=False,
  File "/usr/lib/python2.7/site-packages/pip/_vendor/urllib3/response.py", line 576, in stream
    data = self.read(amt=amt, decode_content=decode_content)
  File "/usr/lib/python2.7/site-packages/pip/_vendor/urllib3/response.py", line 541, in read
    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
  File "/usr/lib64/python2.7/contextlib.py", line 35, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/lib/python2.7/site-packages/pip/_vendor/urllib3/response.py", line 451, in _error_catcher
    raise ReadTimeoutError(self._pool, None, "Read timed out.")
ReadTimeoutError: HTTPSConnectionPool(host='pypi.tuna.tsinghua.edu.cn', port=443): Read timed out.
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support