[英]How to use PyArray_SearchSorted in Numpy C API
In a C extension, I am accessing two arrays passed to the function: 在C扩展中,我正在访问传递给函数的两个数组:
PyObject *xw_array = PyArray_FROM_OTF(xw_obj, NPY_DOUBLE, NPY_IN_ARRAY);
PyObject *x1_array = PyArray_FROM_OTF(x1_obj, NPY_DOUBLE, NPY_IN_ARRAY);
and I then want to use PyArray_SearchSorted
with these two arrays - I am currently doing: 然后我想对这两个数组使用PyArray_SearchSorted
我目前正在做:
PyObject *ix_array = PyArray_SearchSorted(xw_array, x1_array);
But this leads to the following error: 但这会导致以下错误:
propagate_pure.c:123:138: error: too few arguments to function call, expected 4, have 2
PyObject *ix_array = (*(PyObject * (*)(PyArrayObject *, PyObject *, NPY_SEARCHSIDE, PyObject *)) PyArray_API[131])(xw_array, x1_array);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
What is the correct way to use PyArray_SearchSorted
? 使用PyArray_SearchSorted
的正确方法是什么? What are the four arguments required? 需要四个参数? The documentation only mentions two. 该文档仅提及两个。
The full declaration of PyArray_SearchSorted
is here : PyArray_SearchSorted
的完整声明在这里 :
NPY_NO_EXPORT PyObject *
PyArray_SearchSorted(PyArrayObject *op1, PyObject *op2,
NPY_SEARCHSIDE side, PyObject *perm)
You need to provide a side
and a perm
arguments. 您需要提供一个side
和一个perm
参数。 The defaults being NPY_SEARCHLEFT
and NULL
. 默认NPY_SEARCHLEFT
和NULL
。 So the following should work: 因此,以下应该工作:
PyObject *ix_array = PyArray_SearchSorted(xw_array, x1_array,
NPY_SEARCHLEFT, NULL);
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