ERROR: Exception:

Traceback (most recent call last):

 File "E:\Python\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher

   yield

 File "E:\Python\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read

   data = self._fp.read(amt) if not fp_closed else b""

 File "E:\Python\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read

   data = self.__fp.read(amt)

 File "E:\Python\lib\http\client.py", line 447, in read

   n = self.readinto(b)

 File "E:\Python\lib\http\client.py", line 491, in readinto

   n = self.fp.readinto(b)

 File "E:\Python\lib\socket.py", line 589, in readinto

   return self._sock.recv_into(b)

 File "E:\Python\lib\ssl.py", line 1052, in recv_into

   return self.read(nbytes, buffer)

 File "E:\Python\lib\ssl.py", line 911, in read

   return self._sslobj.read(len, buffer)

ConnectionResetError: [WinError 10054] 远程主机强迫关闭了一个现有的连接。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

 File "E:\Python\lib\site-packages\pip\_internal\cli\base_command.py", line 186, in _main

   status = self.run(options, args)

 File "E:\Python\lib\site-packages\pip\_internal\commands\install.py", line 331, in run

   resolver.resolve(requirement_set)

 File "E:\Python\lib\site-packages\pip\_internal\legacy_resolve.py", line 177, in resolve

   discovered_reqs.extend(self._resolve_one(requirement_set, req))

 File "E:\Python\lib\site-packages\pip\_internal\legacy_resolve.py", line 333, in _resolve_one

   abstract_dist = self._get_abstract_dist_for(req_to_install)

 File "E:\Python\lib\site-packages\pip\_internal\legacy_resolve.py", line 282, in _get_abstract_dist_for

   abstract_dist = self.preparer.prepare_linked_requirement(req)

 File "E:\Python\lib\site-packages\pip\_internal\operations\prepare.py", line 482, in prepare_linked_requirement

   hashes=hashes,

 File "E:\Python\lib\site-packages\pip\_internal\operations\prepare.py", line 287, in unpack_url

   hashes=hashes,

 File "E:\Python\lib\site-packages\pip\_internal\operations\prepare.py", line 159, in unpack_http_url

   link, downloader, temp_dir.path, hashes

 File "E:\Python\lib\site-packages\pip\_internal\operations\prepare.py", line 303, in _download_http_url

   for chunk in download.chunks:

 File "E:\Python\lib\site-packages\pip\_internal\utils\ui.py", line 160, in iter

   for x in it:

 File "E:\Python\lib\site-packages\pip\_internal\network\utils.py", line 39, in response_chunks

   decode_content=False,

 File "E:\Python\lib\site-packages\pip\_vendor\urllib3\response.py", line 564, in stream

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

 File "E:\Python\lib\site-packages\pip\_vendor\urllib3\response.py", line 529, in read

   raise IncompleteRead(self._fp_bytes_read, self.length_remaining)

 File "E:\Python\lib\contextlib.py", line 130, in __exit__

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

 File "E:\Python\lib\site-packages\pip\_vendor\urllib3\response.py", line 443, in _error_catcher

   raise ProtocolError("Connection broken: %r" % e, e)

pip._vendor.urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None)", ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None))