为什么在作为依赖项安装时安装 `pypiwin32` 或 `pywin32` 会失败，但在单独使用 pip 时会成功？

Question

我有 setup.py 这样的：

setup(
    name='pyomexmeta',
    version=version,
    license='MIT',
    long_description=open('README.md').read(),
    long_description_content_type="text/markdown",
    author='Ciaran Welsh',
    author_email='cwelsh2@uw.edu',
    url='https://github.com/sys-bio/libomexmeta',
    keywords=['annotation', 'rdf'],
    # install_requires=open('requirements.txt').read().split('\n'),
    install_requires=["pypiwin32"],
    packages=['pyomexmeta'],
    package_dir={'pyomexmeta': 'src/pyomexmeta'},
    package_data={'pyomexmeta': [
        'LICENCE.txt',
    ] + binaries},
    include_package_data=True,
    classifiers=[_f for _f in CLASSIFIERS.split('\n') if _f],
    platforms=["Windows", "Linux", "Unix"],  # "Mac OS-X", - not yet supported.
)

本题的重要部分在install_requires=['pypiwin32']。当我尝试在新的 conda 环境中从 testpypi 安装我的包时，出现错误：

PS D:\libOmexMeta> conda create -y --name omex python=3.7
PS D:\libOmexMeta> conda activate omex
PS D:\libOmexMeta> pip install --index-url https://test.pypi.org/simple/ pyomexmeta

我得到的错误是这样的：

ERROR: Could not find a version that satisfies the requirement pypiwin32 (from pyomexmeta) (from versions: none)
ERROR: No matching distribution found for pypiwin32 (from pyomexmeta)

然而，当我这样做时

 PS D:\libOmexMeta> pip install pypiwin32

安装成功。

有人知道这是怎么回事吗？

请注意，pywin32 也会发生同样的事情。

Answer 1

清单[PyPA.PIP]: pip install。

通过传递 --index-url https://test.pypi.org/simple，您将 PIP 的（默认）存储库更改为作为参数给出的存储库。但这似乎因 PyPIWin32 ([PyPI.Test]: Links for pypiwin32) 而被打破。
PyWin32 甚至没有在此处列出。

另一方面，在 pip install pypiwin32 的情况下，它使用了默认存储库，它在其中找到了包并且一切正常。

测试:

[cfati@CFATI-5510-0:e:\Work\Dev\Whosebug\q062697213]> sopr.bat
*** Set shorter prompt to better fit when pasted in Whosebug (or other) pages ***

[prompt]>
[prompt]> :: Search default repo
[prompt]> "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\Scripts\python.exe" -m pip -v search pypiwin32
Getting credentials from keyring for pypi.org
Starting new HTTPS connection (1): pypi.org:443
https://pypi.org:443 "POST /pypi HTTP/1.1" 200 200
pypiwin32 (223)  -

[prompt]>
[prompt]> :: Search custom repo
[prompt]> "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\Scripts\python.exe" -m pip -v search -i https://test.pypi.org/simple pypiwin32
Getting credentials from keyring for test.pypi.org
Starting new HTTPS connection (1): test.pypi.org:443
https://test.pypi.org:443 "POST /simple HTTP/1.1" 301 205
Looking up "https://test.pypi.org/simple/" in the cache
Current age based on date: 134
Freshness lifetime from max-age: 600
The response is "fresh", returning cached response
600 > 134
ERROR: Exception:
Traceback (most recent call last):
  File "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\lib\site-packages\pip\_internal\cli\base_command.py", line 186, in _main
    status = self.run(options, args)
  File "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\lib\site-packages\pip\_internal\commands\search.py", line 52, in run
    pypi_hits = self.search(query, options)
  File "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\lib\site-packages\pip\_internal\commands\search.py", line 71, in search
    hits = pypi.search({'name': query, 'summary': query}, 'or')
  File "c:\Install\pc064\Python\Python.07.06\Lib\xmlrpc\client.py", line 1112, in __call__
    return self.__send(self.__name, args)
  File "c:\Install\pc064\Python\Python.07.06\Lib\xmlrpc\client.py", line 1452, in __request
    verbose=self.__verbose
  File "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\lib\site-packages\pip\_internal\network\xmlrpc.py", line 38, in request
    return self.parse_response(response.raw)
  File "c:\Install\pc064\Python\Python.07.06\Lib\xmlrpc\client.py", line 1342, in parse_response
    return u.close()
  File "c:\Install\pc064\Python\Python.07.06\Lib\xmlrpc\client.py", line 654, in close
    raise ResponseError()
xmlrpc.client.ResponseError: ResponseError()

要解决您的问题，可以：

因为您已经安装了依赖项，所以不要尝试通过传递 --no-deps 来安装它们：pip install --no-deps --index-url https://test.pypi.org/simple pyomexmeta
通过传递 --extra-index-url 指定额外的存储库（默认的）（！没有测试一下！）

检查来自 [GitHub]: sys-bio/libOmexMeta - sys-bio.github.io/libsemsim-docs 的注释。

您可能还想看看 [Anaconda]: Using Pip in a Conda Environment。

为什么在作为依赖项安装时安装 `pypiwin32` 或 `pywin32` 会失败，但在单独使用 pip 时会成功？

Why does installing `pypiwin32` or `pywin32` fail when installing as a dependency but succeed when just using pip on its own?

python

pip

pywin32

conda

python-packaging