【发布时间】：2019-05-02 14:55:39
【问题描述】：
我正在尝试将密码术安装到我的系统中，但出现此错误：
WARNING: Missing build requirements in pyproject.toml for cryptography from https://files.pythonhosted.org/packages/07/ca/bc827c5e55918ad223d59d299fff92f3563476c3b00d0a9157d9c0217449/cryptography-2.6.1.tar.gz#sha256=26c821cbeb683facb966045e2064303029d572a87ee69ca5a1bf54bf55f93ca6.
WARNING: The project does not specify a build backend, and pip cannot fall back to setuptools without 'setuptools>=40.8.0' and 'wheel'.
Getting requirements to build wheel ... done
ERROR: Exception:
Traceback (most recent call last):
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 178, in main
status = self.run(options, args)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 352, in run
resolver.resolve(requirement_set)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 131, in resolve
self._resolve_one(requirement_set, req)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 294, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 242, in _get_abstract_dist_for
self.require_hashes
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 368, in prepare_linked_requirement
abstract_dist.prep_for_dist(finder, self.build_isolation)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 175, in prep_for_dist
self.install_backend_dependencies(finder=finder)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 123, in install_backend_dependencies
reqs = req.pep517_backend.get_requires_for_build_wheel()
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 71, in get_requires_for_build_wheel
'config_settings': config_settings
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 162, in _call_hook
raise BackendUnavailable
pip._vendor.pep517.wrappers.BackendUnavailable
这是我的设置：
Alpine Linux 3.6.2
Python 3.6.3
点 19.1
车轮 0.33.1
- 设置工具 41.0.1
知道可能是什么问题，或者如何解决？ 提前感谢您的帮助！
【问题讨论】：
-
好像
pip install cryptography --no-use-pep517解决了问题
标签： python pip cryptography