Python PyArg_ParseTupleAndKeywords在指定对象时需要空参数?
我在C Python扩展中调用了以下Python PyArg_ParseTupleAndKeywords在指定对象时需要空参数?,python,python-c-api,cpython,Python,Python C Api,Cpython,我在C Python扩展中调用了以下PyArg_ParseTupleAndKeywords: static char *kwlist [] = { "page_slug", "keys", "facets", "categories", "max_level", "current_level", "level", "parent_slug", "query", "include_category", "include_ancestor", NULL }; int max
PyArg_ParseTupleAndKeywords
:
static char *kwlist [] = {
"page_slug", "keys", "facets", "categories", "max_level",
"current_level", "level", "parent_slug", "query",
"include_category", "include_ancestor", NULL
};
int max_level, current_level, level = 0;
PyObject *page_slug, *keys, *facets, *categories,
*parent_slug = PyString_FromString(""), *query = Py_None,
*include_category = Py_True, *include_ancestor = Py_True;
if (!PyArg_ParseTupleAndKeywords(
args, kwargs, "OO!O!O!ii|iOOO!O!", kwlist,
&page_slug, &PyList_Type, &keys,
&PyDict_Type, &facets, &PyDict_Type, &categories,
&max_level, ¤t_level, &level, &parent_slug,
&PyBool_Type, &include_category,
&PyBool_Type, &include_ancestor)) {
return NULL;
}
这将导致签名,如:
func(page_slug, keys, facets, categories, max_level,
current_level, level=0, parent_slug="", query=None,
include_category=True, include_ancestor=True)
但是,当从Python中调用该方法时,会引发TypeError
,如下所示:
TypeError: argument 10 must be (null), not bool
有人能解释为什么参数10在理论上应该接受一个PyObject*
时被期望为NULL
?还有,如何纠正这一点
编辑:
在Python中,函数的调用方式为:
func(page_slug, keys, facets, categories, max_level,
current_level, level=level + 1, parent_slug=slug,
query=query, include_category=include_category,
include_ancestor=include_ancestor)
当页面段塞
、父段塞
和查询
是unicode对象时,键
是一个列表,最大级别
、当前级别
和级别
是整数,面
和类别
是dict
不包括布尔参数(include_祖先
和include_类别
)是有效的(或者更确切地说,调用PyArg\u ParseTupleAndKeywords
是有效的,目前在C函数中出现了一个分段错误),但包括这两个参数都会导致出现TypeError
将对PyArg_ParseTupleAndKeyword
的调用更改为:
PyArg_ParseTupleAndKeywords(
args, kwargs, "OO!O!O!ii|iOOOO", kwlist,
&page_slug, &PyList_Type, &keys,
&PyDict_Type, &facets, &PyDict_Type, &categories,
&max_level, ¤t_level, &level, &parent_slug,
&include_category, &include_ancestor)
(即,删除
include_category
和include_祖先
)的布尔要求会导致PyArg_ParseTupleAndKeywords
中出现分段错误,您没有在和parent_slug之后将查询传递给PyArg_ParseTupleAndKeywords
电话应该是
if (!PyArg_ParseTupleAndKeywords(
args, kwargs, "OO!O!O!ii|iOOO!O!", kwlist,
&page_slug, &PyList_Type, &keys,
&PyDict_Type, &facets, &PyDict_Type, &categories,
&max_level, ¤t_level, &level, &parent_slug,
&query, &PyBool_Type, &include_category,
&PyBool_Type, &include_ancestor)) {
return NULL;
}
您最初的调用导致格式和对象列表不匹配,因此引发了一个异常(我认为)
分解格式和传递的内容
O &page_slug
O! &PyList_Type, &keys
O! &PyDict_Type, &facets
O! &PyDict_Type, &categories
i &max_level
i| ¤t_level
i &level
O &parent_slug
O ---
O! &PyBool_Type, &include_category
O! &PyBool_Type, &include_ancestor
您可以演示如何从python端调用函数吗?指定和不指定参数时是否都会引发错误?