使用Poetry安装timesynth失败，求助解决symengine构建错误

问题详情 #

执行poetry add timesynth时触发以下构建错误：

Backend subprocess exited when trying to invoke build_wheel

  error: Multiple top-level packages discovered in a flat-layout: ['cmake', 'symengine'].

  To avoid accidental inclusion of unwanted files or directories,
  setuptools will not proceed with this build.

  If you are trying to create a single distribution with multiple packages
  on purpose, you should not rely on automatic discovery.
  Instead, consider the following options:

  1. set up custom discovery (`find` directive with `include` or `exclude`)
  2. use a `src-layout`
  3. explicitly set `py_modules` or `packages` with a list of names

  To find more information, look for "package discovery" on setuptools docs.

问题根源在于依赖的symengine 0.4.0版本源码布局不符合setuptools自动发现规则，修改本地项目的pyproject.toml（如下列尝试）无法解决该问题：

[tool.setuptools]
py-modules = []

或

[tool.setuptools.packages.find]
where = ["symengine"]
include = ["pkg*", "symengine"]
namespaces = false

环境：Windows 11、Python 3.11

可行解决方案 #

1. 安装symengine预编译wheel（推荐） #

先手动安装适配Windows+Python3.11的symengine预编译wheel，再安装timesynth：

• 下载对应版本的wheel文件（Python3.11 64位版本）
• 执行本地安装：

  pip install symengine-0.4.0-cp311-cp311-win_amd64.whl
  

• 再执行：

  poetry add timesynth
  

2. 通过conda安装symengine #

若使用conda环境，先安装指定版本的symengine再添加timesynth：

conda install symengine=0.4.0
poetry add timesynth

3. 降级Python版本到3.10 #

symengine 0.4.0对Python3.11的支持不完善，降级到Python3.10后，直接执行poetry add timesynth即可正常构建安装。

4. 修改symengine源码构建配置（进阶） #

手动修改依赖包的构建配置：

• 下载symengine 0.4.0的源码包
• 打开源码根目录的setup.py，添加明确的包声明：

  setup(
      # 保留原有其他配置
      packages=["symengine"],
      exclude=["cmake"]
  )
  

• 本地构建并安装：

  pip install .
  

• 再安装timesynth

内容的提问来源于stack exchange，提问作者mkranj