error

$ pip3 install --user -r ./requirements.txt
Collecting quamash (from -r ./requirements.txt (line 1))
  Using cached https://files.pythonhosted.org/packages/89/41/ba1396ebed0dcfd09854addea45323c93f498dc7c45d855943ab31791194/Quamash-0.6.1-py3-none-any.whl
Collecting PyQt5 (from -r ./requirements.txt (line 2))
  Downloading https://files.pythonhosted.org/packages/7f/8a/a6346c9772cda4a7fa6ad7737df1bc8588033867eeacb71a6fdad4487813/PyQt5-5.11.2-5.11.1-cp35.cp36.cp37.cp38-abi3-macosx_10_6_intel.whl (90.1MB)
    2% |▊                               | 2.1MB 303kB/s eta 0:04:51Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 331, in _error_catcher
    yield
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 413, in read
    data = self._fp.read(amt)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/cachecontrol/filewrapper.py", line 62, in read
    data = self.__fp.read(amt)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 449, in read
    n = self.readinto(b)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 493, in readinto
    n = self.fp.readinto(b)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/socket.py", line 586, in readinto
    return self._sock.recv_into(b)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 1009, in recv_into
    return self.read(nbytes, buffer)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 871, in read
    return self._sslobj.read(len, buffer)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 631, in read
    v = self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/basecommand.py", line 141, in main
    status = self.run(options, args)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 299, in run
    resolver.resolve(requirement_set)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 102, in resolve
    self._resolve_one(requirement_set, req)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 256, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 209, in _get_abstract_dist_for
    self.require_hashes
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 283, in prepare_linked_requirement
    progress_bar=self.progress_bar
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/download.py", line 836, in unpack_url
    progress_bar=progress_bar
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/download.py", line 673, in unpack_http_url
    progress_bar)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/download.py", line 897, in _download_http_url
    _download_url(resp, link, content_file, hashes, progress_bar)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/download.py", line 617, in _download_url
    hashes.check_against_chunks(downloaded_chunks)
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/hashes.py", line 48, in check_against_chunks
    for chunk in chunks:
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/download.py", line 585, in written_chunks
    for chunk in chunks:
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/utils/ui.py", line 159, in iter
    for x in it:
  File "/usr/local/lib/python3.6/site-packages/pip/_internal/download.py", line 574, in resp_read
    decode_content=False):
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 465, in stream
    data = self.read(amt=amt, decode_content=decode_content)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 430, in read
    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
  File "/usr/local/Cellar/python/3.6.4_3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/local/lib/python3.6/site-packages/pip/_vendor/urllib3/response.py", line 336, 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.