win7 64位系统,控制台下载后报错

  Downloading https://files.pythonhosted.org/packages/e7/f9/f0b53f88060247251bf4
81fa6ea62cd0d25bf1b11a87888e53ce5b7c8ad2/pytz-2019.3-py2.py3-none-any.whl (509kB
)
Exception:
Traceback (most recent call last):
  File "d:\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 302
, in _error_catcher
    yield
  File "d:\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 384
, in read
    data = self._fp.read(amt)
  File "d:\python37\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py",
line 60, in read
    data = self.__fp.read(amt)
  File "d:\python37\lib\http\client.py", line 447, in read
    n = self.readinto(b)
  File "d:\python37\lib\http\client.py", line 491, in readinto
    n = self.fp.readinto(b)
  File "d:\python37\lib\socket.py", line 589, in readinto
    return self._sock.recv_into(b)
  File "d:\python37\lib\ssl.py", line 1052, in recv_into
    return self.read(nbytes, buffer)
  File "d:\python37\lib\ssl.py", line 911, in read
    return 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 "d:\python37\lib\site-packages\pip\_internal\basecommand.py", line 228, i
n main
    status = self.run(options, args)
  File "d:\python37\lib\site-packages\pip\_internal\commands\install.py", line 2
91, in run
    resolver.resolve(requirement_set)
  File "d:\python37\lib\site-packages\pip\_internal\resolve.py", line 103, in re
solve
    self._resolve_one(requirement_set, req)
  File "d:\python37\lib\site-packages\pip\_internal\resolve.py", line 257, in _r
esolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "d:\python37\lib\site-packages\pip\_internal\resolve.py", line 210, in _g
et_abstract_dist_for
    self.require_hashes
  File "d:\python37\lib\site-packages\pip\_internal\operations\prepare.py", line
 310, in prepare_linked_requirement
    progress_bar=self.progress_bar
  File "d:\python37\lib\site-packages\pip\_internal\download.py", line 837, in u
npack_url
    progress_bar=progress_bar
  File "d:\python37\lib\site-packages\pip\_internal\download.py", line 674, in u
npack_http_url
    progress_bar)
  File "d:\python37\lib\site-packages\pip\_internal\download.py", line 898, in _
download_http_url
    _download_url(resp, link, content_file, hashes, progress_bar)
  File "d:\python37\lib\site-packages\pip\_internal\download.py", line 618, in _
download_url
    hashes.check_against_chunks(downloaded_chunks)
  File "d:\python37\lib\site-packages\pip\_internal\utils\hashes.py", line 48, i
n check_against_chunks
    for chunk in chunks:
  File "d:\python37\lib\site-packages\pip\_internal\download.py", line 586, in w
ritten_chunks
    for chunk in chunks:
  File "d:\python37\lib\site-packages\pip\_internal\utils\ui.py", line 159, in i
ter
    for x in it:
  File "d:\python37\lib\site-packages\pip\_internal\download.py", line 575, in r
esp_read
    decode_content=False):
  File "d:\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 436
, in stream
    data = self.read(amt=amt, decode_content=decode_content)
  File "d:\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 401
, in read
    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
  File "d:\python37\lib\contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "d:\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 307
, 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.
You are using pip version 10.0.1, however version 20.0.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' comm
and.