没有保存错误信息，在网上copy了相似的(前两行都出现了加粗字)： Traceback (most recent call last): File “d:\usedtool\python\lib\site-packages\pip_vendor\urllib3\response.py”, line 302, in _error_catcher yield File “d:\usedtool\python\lib\site-packages\pip_vendor\urllib3\response.py”, line 384, in read data = self._fp.read(amt) File “d:\usedtool\python\lib\site-packages\pip_vendor\cachecontrol\filewrapper.py”, line 60, in read data = self.__fp.read(amt) File “d:\usedtool\python\lib\http\client.py”, line 449, in read n = self.readinto(b) File “d:\usedtool\python\lib\http\client.py”, line 493, in readinto n = self.fp.readinto(b) File “d:\usedtool\python\lib\socket.py”, line 586, in readinto return self._sock.recv_into(b) File “d:\usedtool\python\lib\ssl.py”, line 1009, in recv_into return self.read(nbytes, buffer) File “d:\usedtool\python\lib\ssl.py”, line 871, in read return self._sslobj.read(len, buffer) File “d:\usedtool\python\lib\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 “d:\usedtool\python\lib\site-packages\pip_internal\basecommand.py”, line 228, in main status = self.run(options, args) File “d:\usedtool\python\lib\site-packages\pip_internal\commands\install.py”, line 291, in run resolver.resolve(requirement_set) File “d:\usedtool\python\lib\site-packages\pip_internal\resolve.py”, line 103, in resolve self._resolve_one(requirement_set, req) File “d:\usedtool\python\lib\site-packages\pip_internal\resolve.py”, line 257, in _resolve_one abstract_dist = self._get_abstract_dist_for(req_to_install) File “d:\usedtool\python\lib\site-packages\pip_internal\resolve.py”, line 210, in _get_abstract_dist_for self.require_hashes File “d:\usedtool\python\lib\site-packages\pip_internal\operations\prepare.py”, line 310, in prepare_linked_requirement progress_bar=self.progress_bar File “d:\usedtool\python\lib\site-packages\pip_internal\download.py”, line 837, in unpack_url progress_bar=progress_bar File “d:\usedtool\python\lib\site-packages\pip_internal\download.py”, line 674, in unpack_http_url progress_bar) File “d:\usedtool\python\lib\site-packages\pip_internal\download.py”, line 898, in _download_http_url _download_url(resp, link, content_file, hashes, progress_bar) File “d:\usedtool\python\lib\site-packages\pip_internal\download.py”, line 618, in _download_url hashes.check_against_chunks(downloaded_chunks) File “d:\usedtool\python\lib\site-packages\pip_internal\utils\hashes.py”, line 48, in check_against_chunks for chunk in chunks: File “d:\usedtool\python\lib\site-packages\pip_internal\download.py”, line 586, in written_chunks for chunk in chunks: File “d:\usedtool\python\lib\site-packages\pip_internal\utils\ui.py”, line 159, in iter for x in it: File “d:\usedtool\python\lib\site-packages\pip_internal\download.py”, line 575, in resp_read decode_content=False): File “d:\usedtool\python\lib\site-packages\pip_vendor\urllib3\response.py”, line 436, in stream data = self.read(amt=amt, decode_content=decode_content) File “d:\usedtool\python\lib\site-packages\pip_vendor\urllib3\response.py”, line 401, in read raise IncompleteRead(self._fp_bytes_read, self.length_remaining) File “d:\usedtool\python\lib\contextlib.py”, line 99, in exit self.gen.throw(type, value, traceback) File “d:\usedtool\python\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.