[英]Can't `pip install numpy` with a Python 3.9 venv
我安裝了 Python 3.9,創建了一個venv
並嘗試安裝 numpy。 Cython 有一個錯誤,已在主干中修復。
所以我安裝在 venv Cython 3.0a0 並重試:
(venv) marco@buzz:~/sources/cython$ pip install numpy --no-cache-dir
[...]
收集 Cython>=0.29.13
[...]
錯誤:命令出錯,退出狀態為 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' 檢查日志以獲取完整的命令輸出。
所以我試圖在函數def install_requirements
注釋掉--ignore-installed
在venv/lib/python3.9/site-packages/pip/_internal/build_env.py
中。 我收到此錯誤:
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'
所以我手動安裝了依賴項並嘗試使用--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
[...]
和以前一樣的錯誤。 --no-deps
被忽略,並且--ignore-installed
強制從 Pypi 下載 Cython,這不適用於 Python 3.9。
顯然,沒有--no-ignore-installed
或--ignore-installed=0
。 而事實是
pip
忽略--no-deps
venv
注釋掉--ignore-installed
, pip
無法找到已安裝的模塊我在舊的easy_install
取得了成功,所以我認為它現在很好。 我會報告這個錯誤(我猜是給venv
開發人員)。
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