尝试通过boost/Python相对于顶级包的相对导入 [英] attempted relative import beyond top-level package with boost/Python

问题描述

我已经尝试了多种方法来在帖子

I've tried multiple ways to import a module in a post here, but I decided to post a new question since that post was about boost not being able to find the module. Here's the structure of the folder:

project
   |__ utilities
   |      |__ foo.py
   |
   |__ boost_extensions
   |      |__ myclass.cpp
   |      |__ myclass.so
   |
   |__ someotherstuff
   |      |__ bar.py      
   |
   |__ mylib.py
   |
   |__ __main__.py

在foo.py中，我有一些代码是从mylib.py导入的:

in foo.py, I have some code that imports from mylib.py:

from ..mylib import MyLib
class Foo:
    # code

在myclass.cpp中，我找不到使用相对路径导入Foo的方法，因此我使用了绝对路径(灵感来自帖子

in myclass.cpp, I could not find a way to import Foo using a relative path, so I used an absolute path (inspired from an answer to the post here):

boost::python::object mod;
void set_global(){
    boost::python::object importlib_util = import("importlib.util");

    boost::python::object spec = \
        importlib_util.attr("spec_from_file_location")("module.name",\
            "/home/username/projectfiles/project/utilities/foo.py");

    boost::python::object foo = importlib_util.attr("module_from_spec")(spec);
    mod = spec.attr("loader").attr("exec_module")(foo);
}

这给了我一个错误:

    from ..mylib import MyLib
ValueError: attempted relative import beyond top-level package

我该如何解决?

谢谢

edit:不确定是否相关，但是如果我打印变量__name__，则始终为module.name，无论我在代码中输入了什么

edit : not sure if this is relevant or not but if I print the variable __name__ it's always module.name, regardless of what I put in the code

# with ..utilities.foo instead of module.name in the function 
# importlib_util.attr("spec_from_file_location")("module.name",\
#            "home/username/projectfiles/project/utilities/foo.py");
print(__name__)
from ..mylib import MyLib
#output : module.name

推荐答案

我发布了一个类似的问题，并为此提出了解决方案也可以在这里工作(这是关于尝试通过使用相对路径在C ++中导入python模块，我对此发表了另一篇文章，因为它给出了完全不同的错误).基本上，我将模块加载到python中，并将其作为参数传递给C ++.

I posted a similar question and the solution for that works here too (it was about trying to import a python module in C++ by using a relative path, I made a different post about it because it gave a completely different error). Basically I loaded the module in python and passed it as an argument to C++.

这篇关于尝试通过boost/Python相对于顶级包的相对导入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！