英文:
Python setuptools exclude dependencies when installing
问题
Python的setuptools允许您指定可选依赖项，但它是否允许您执行相反的操作？
例如，假设我在my_package中有一个依赖项列表，如下所示：
- numpy
- pandas
因此，如果我使用pip install my_package安装包，它还将安装这两个依赖项。
然而，对于某些用例，用户可能不需要pandas。因此，我想要执行类似pip install my_package[~pandas]之类的操作，指示pip不安装pandas。
目前是否支持这样的操作？
英文:
Python setuptools allows you to specify optional dependencies, but does it allow you to do something in the inverse?
For example, let's say I have a list of dependencies in my_package like below:
- numpy
- pandas
So if I installed the package with pip install my_package, it would also install these two dependencies.
However, for certain use cases, a user may not need pandas. So I would want to do something like pip install my_package[~pandas] or something like that to instruct pip to not install pandas.
Is this something that is currently supported?
答案1
得分: 2
目前不支持此功能 - 额外内容严格是累加的。已经提出了多次建议，但似乎从未有过进展。
最新的讨论在这里：
提案 - 扩展可选依赖项以支持取消建议/默认可安装项的选择。
作为一种解决方法，您可以使用：
pip install --no-deps my_package
但这将排除_每一个_依赖项，包括pandas。您需要手动查找并安装其他依赖项。
英文:
It is not currently supported - extras are strictly additive. It has been proposed several times, but the discussions never seem to get anywhere.
The latest discussion is here:
Proposal - expanding optional dependencies to support opt-out of recommended/default installables.
As a workaround, you can use:
pip install --no-deps my_package
But this would exclude every dependency, including pandas. You'd have to find and install the other dependencies manually.
答案2
得分: 1
正如您提到的，虽然可以通过以下方式安装可选依赖项：
pip install my_package[super,cool]
但是相反的情况，阻止安装依赖项 (!cool) 是不可能的。Wim已经提到了 --no-deps 的解决方法。另一个解决方法可能是提供两个版本，my_package 和 my_package_vanilla，它们具有不同的依赖关系。然后用户可以按照以下方式安装：
- 使用
my_package安装普通用户所需的所有默认依赖项 - 使用
my_package_vanilla仅安装my_package的最基本版本（可能甚至没有附加功能？） - 使用
my_package_vanilla[pandas,super,cool]安装用户选择的三组额外依赖项。
英文:
As you mentioned, while it is possible to install optional dependencies with, for example
pip install my_package[super,cool]
the opposite, keeping from installing dependencies (!cool) is not possible. Wim already mentioned the --no-deps workaround. Another workaround might be to provide two versions, my_package and my_package_vanilla with different dependencies. Then user could install, for example:
my_packageto install all default dependencies needed by the average usermy_package_vanillato install just the bare bones version ofmy_package(perhaps even non-functional without extras?)my_package_vanilla[pandas,super,cool]installing three sets of extra dependencies chosen by the user.
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