[英]Can't `pip install numpy` with a Python 3.9 venv
I installed Python 3.9, created a venv
and tried to install numpy.我安装了 Python 3.9,创建了一个
venv
并尝试安装 numpy。 There was an error with Cython, that was fixed in trunk. Cython 有一个错误,已在主干中修复。
So I installed in the venv Cython 3.0a0 and retried:所以我安装在 venv Cython 3.0a0 并重试:
(venv) marco@buzz:~/sources/cython$ pip install numpy --no-cache-dir
(venv) marco@buzz:~/sources/cython$ pip install numpy --no-cache-dir
[...]
[...]
Collecting Cython>=0.29.13
收集 Cython>=0.29.13
[...]
[...]
ERROR: Command errored out with exit status 1: /home/marco/sources/tests/more_itertools/venv/bin/python3.9 /home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-3ctn3kl8/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel 'Cython>=0.29.13' Check the logs for full command output.
错误:命令出错,退出状态为 1:/home/marco/sources/tests/more_itertools/venv/bin/python3.9 /home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages /pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-3ctn3kl8/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel 'Cython>=0.29.13' 检查日志以获取完整的命令输出。
So I tried to comment out --ignore-installed
in venv/lib/python3.9/site-packages/pip/_internal/build_env.py
, in function def install_requirements
.所以我试图在函数
def install_requirements
注释掉--ignore-installed
在venv/lib/python3.9/site-packages/pip/_internal/build_env.py
中。 I get this error:我收到此错误:
ERROR: Exception:
Traceback (most recent call last):
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/cli/base_command.py", line 153, in _main
status = self.run(options, args)
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/commands/install.py", line 382, in run
resolver.resolve(requirement_set)
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/legacy_resolve.py", line 201, in resolve
self._resolve_one(requirement_set, req)
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/legacy_resolve.py", line 365, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/legacy_resolve.py", line 312, in _get_abstract_dist_for
abstract_dist = self.preparer.prepare_linked_requirement(
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/operations/prepare.py", line 223, in prepare_linked_requirement
abstract_dist = _get_prepared_distribution(
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/operations/prepare.py", line 49, in _get_prepared_distribution
abstract_dist.prepare_distribution_metadata(finder, build_isolation)
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/distributions/source/legacy.py", line 37, in prepare_distribution_metadata
self._setup_isolation(finder)
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_internal/distributions/source/legacy.py", line 90, in _setup_isolation
reqs = backend.get_requires_for_build_wheel()
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_vendor/pep517/wrappers.py", line 151, in get_requires_for_build_wheel
return self._call_hook('get_requires_for_build_wheel', {
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_vendor/pep517/wrappers.py", line 255, in _call_hook
raise BackendUnavailable(data.get('traceback', ''))
pip._vendor.pep517.wrappers.BackendUnavailable: Traceback (most recent call last):
File "/home/marco/sources/tests/more_itertools/venv/lib/python3.9/site-packages/pip/_vendor/pep517/_in_process.py", line 63, in _build_backend
obj = import_module(mod_path)
File "/usr/local/lib/python3.9/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1016, in _gcd_import
File "<frozen importlib._bootstrap>", line 993, in _find_and_load
File "<frozen importlib._bootstrap>", line 963, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1016, in _gcd_import
File "<frozen importlib._bootstrap>", line 993, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'setuptools'
So I installed manually the dependencies and tried with --no-deps
:所以我手动安装了依赖项并尝试使用
--no-deps
:
(venv) marco@buzz:~/sources/tests/more_itertools/venv$ pip install numpy --no-deps
Collecting numpy
Using cached https://files.pythonhosted.org/packages/31/0a/5df350c29a06835d534a6c4f5681075304da38d85f1c69e5226a635a67ce/numpy-1.18.0.zip
Installing build dependencies ... error
[...]
and same error as before.和以前一样的错误。
--no-deps
is ignored, and --ignore-installed
force to download Cython from Pypi, that does not work with Python 3.9. --no-deps
被忽略,并且--ignore-installed
强制从 Pypi 下载 Cython,这不适用于 Python 3.9。
Apparently, there's no --no-ignore-installed
, or --ignore-installed=0
.显然,没有
--no-ignore-installed
或--ignore-installed=0
。 And the facts that而事实是
pip
ignores --no-deps
pip
忽略--no-deps
--ignore-installed
in the venv
, pip
fails to find already installed modulevenv
注释掉--ignore-installed
, pip
无法找到已安装的模块I had success with the good old easy_install
, so I think it's good for now.我在旧的
easy_install
取得了成功,所以我认为它现在很好。 I'll report this bug (to venv
devs, I guess).我会报告这个错误(我猜是给
venv
开发人员)。
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