如何将 kwargs 传递给 boost-python 包装函数？
我有一个带有此签名的 python 函数：
def post_message(self, message, *args, **kwargs):
我想从 c++ 调用该函数并向其传递一些 kwargs。调用该函数不是问题。知道如何通过 kwargs 是。这是一个不起作用的释义示例：
std::string message("aMessage");
boost::python::list arguments;
arguments.append("1");
boost::python::dict options;
options["source"] = "cpp";
boost::python::object python_func = get_python_func_of_wrapped_object()
python_func(message, arguments, options)
当我在 pdb 中执行此代码时，我得到（这不是我想要的）：
messsage = aMessage
args = (['1'], {'source': 'cpp'})
kwargs = {}
How do you pass the options in my example in the **kwargs字典？
我看过一篇 帖子 建议使用 **options 语法（这太酷了！）：
python_func(message, arguments, **options)
不幸的是，这会导致
TypeError: No to_python (by-value) converter found for C++ type: class boost::python::detail::kwds_proxy
感谢您提供的任何帮助。
I have a python function with this signature:
def post_message(self, message, *args, **kwargs):
I would like to call the function from c++ and pass to it some kwargs. Calling the function is not the problem. Knowing how to pass the kwargs is. Here is a non-working paraphrased sample:
std::string message("aMessage");
boost::python::list arguments;
arguments.append("1");
boost::python::dict options;
options["source"] = "cpp";
boost::python::object python_func = get_python_func_of_wrapped_object()
python_func(message, arguments, options)
When I exercise this code, in pdb I get (which is not what I would like):
messsage = aMessage
args = (['1'], {'source': 'cpp'})
kwargs = {}
How do you pass the options in my example in the **kwargs dictionary ?
I have seen one post suggesting to use the **options syntax (how cool is this!):
python_func(message, arguments, **options)
Unfortunately, this results in
TypeError: No to_python (by-value) converter found for C++ type: class boost::python::detail::kwds_proxy
Thank you for any help you can give.
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经过一番调查，发现对象函数调用运算符被
args_proxy和kwds_proxy类型的两个参数覆盖。 >。因此，您必须使用两个参数的特定调用方式。args_proxy和kwds_proxy由 * 重载生成。这真的很好。此外，第一个参数必须是元组类型，以便 python 解释器正确处理 *args 参数。
结果示例有效：
希望这有帮助......
After some investigation, it turns out that the object function call operator is overridden for two arguments of type
args_proxyandkwds_proxy. So you have to use this specific call style of two arguments.args_proxyandkwds_proxyare generated by the * overloads. This is really nice.Additionally, the first argument must be a tuple type so that the python interpreter correctly handles the *args argument.
The resulting example works:
Hope this helps...