poetry管理的python>=3.5项目下如何使用python black formatter？

Question

我用 Poetry 创建了一个 python 项目 "foo"。这是pyproject.toml的内容：

[tool.poetry]
name = "bar"
version = "0.1.0"
description = ""

[tool.poetry.dependencies]
python = ">=3.5"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry>=0.12"]
build-backend = "poetry.masonry.api"

此包与 Python3.5 兼容。我想要 black 格式化程序，它与 Python3.5 不兼容。我觉得用Python>=3.6做开发是没问题的，就是装不上black formatter:

$ poetry add black --dev
[SolverProblemError]
The current project's Python requirement (>=3.5) is not compatible with some of the required packages Python requirement:
  - black requires Python >=3.6

Because no versions of black match >19.10b0,<20.0
 and black (19.10b0) requires Python >=3.6, black is forbidden.
So, because bar depends on black (^19.10b0), version solving failed.

所以我直接用pip安装black:

$ poetry run pip install black

我不喜欢这种方式。我想装black诗

我该怎么办？（不想修改依赖为python>=3.6）

Answer 1

您需要编辑 pyproject.toml 中的 python 值：

[tool.poetry]
name = "bar"
version = "0.1.0"
description = ""

[tool.poetry.dependencies]
python = ">=3.6"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry>=0.12"]
build-backend = "poetry.masonry.api"

Answer 2

好像有点晚了，其实black只支持也可以为所欲为Python >=3.6.2

在您的 pyproject.toml 中，您可以定义一个受限的依赖项，如 https://python-poetry.org/docs/dependency-specification/#python-restricted-dependencies

中所述

[tool.poetry.dependencies]
python = ">=3.5"

[tool.poetry.dev-dependencies]
black = {version = "^21.7b0", python = ">=3.6.2"}

Poetry 不会抱怨，您也不会有任何问题，因为它是开发依赖项。

poetry管理的python>=3.5项目下如何使用python black formatter？

How to use python black formatter under a project for python>=3.5 managed by poetry?

python

python-poetry