问题描述
我试图在运行macOS的计算机上安装Qiskit 0.20.0，并看到以下错误
pip install qiskit
Collecting qiskit
Using cached qiskit-0.20.0.tar.gz (4.0 kB)
Collecting qiskit-terra==0.15.1
Downloading qiskit_terra-0.15.1-cp38-cp38-macosx_10_9_x86_64.whl (7.6 MB)
|██▏ | 522 kB 7.7 kB/s eta 0:15:22ERROR: Exception:
Traceback (most recent call last):
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py",line 437,in _error_catcher
yield
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py",line 519,in read
data = self._fp.read(amt) if not fp_closed else b""
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_vendor/cachecontrol/filewrapper.py",line 62,in read
data = self.__fp.read(amt)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/http/client.py",line 458,in read
n = self.readinto(b)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/http/client.py",line 502,in readinto
n = self.fp.readinto(b)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/socket.py",line 669,in readinto
return self._sock.recv_into(b)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/ssl.py",line 1241,in recv_into
return self.read(nbytes,buffer)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/ssl.py",line 1099,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 "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/cli/base_command.py",line 216,in _main
status = self.run(options,args)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/cli/req_command.py",line 182,in wrapper
return func(self,options,args)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/commands/install.py",line 324,in run
requirement_set = resolver.resolve(
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py",line 183,in resolve
discovered_reqs.extend(self._resolve_one(requirement_set,req))
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/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/local/anaconda3/envs/qiskit_env/lib/python3.8/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/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/operations/prepare.py",line 467,in prepare_linked_requirement
local_file = unpack_url(
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/operations/prepare.py",line 255,in unpack_url
file = get_http_url(
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/operations/prepare.py",line 129,in get_http_url
from_path,content_type = _download_http_url(
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/operations/prepare.py",line 282,in _download_http_url
for chunk in download.chunks:
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/cli/progress_bars.py",line 168,in iter
for x in it:
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_internal/network/utils.py",line 64,in response_chunks
for chunk in response.raw.stream(
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py",line 576,in stream
data = self.read(amt=amt,decode_content=decode_content)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py",line 541,in read
raise IncompleteRead(self._fp_bytes_read,self.length_remaining)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/contextlib.py",line 131,in __exit__
self.gen.throw(type,value,traceback)
File "/usr/local/anaconda3/envs/qiskit_env/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py",line 442,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.
我的计算机上的anaconda版本是4.8.4，Python版本是3.8.5。
我已按照here的说明进行操作，并在运行之前创建了虚拟环境
pip install qiskit
解决方法
这似乎只是网络问题。错误是当files.pythonhosted.org从PyPI下载pip包时尝试读取qiskit-terra时超时。除了在这种情况下重试外，您实际上无能为力。如果您的网络连接缓慢和/或不可靠，则可能需要尝试几次才能成功下载所有qiskit软件包（及其依赖项）。