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Tôi đang chuyển đổi một memoryview Cython đến một mảng NumPy (để có thể sử dụng nó trong mã Python tinh khiết):Cython NumPy cảnh báo về NPY_NO_DEPRECATED_API khi sử dụng MemoryView
from libc.stdlib cimport realloc
cimport numpy as np
DTYPE = np.float64
ctypedef np.float64_t DTYPE_t
cpdef np.ndarray[DTYPE_t] compute(DTYPE_t[:,::1] data):
cdef unsigned int Nchannels = data.shape[0]
cdef unsigned int Ndata = data.shape[1]
cdef DTYPE_t* output = NULL
cdef DTYPE_t[::1] mv
output = <DTYPE_t*>realloc(output, Ndata*sizeof(output))
if not output:
raise MemoryError()
mv = <DTYPE_t[:Ndata]>output
mv[10:Ndata-10] = 0.0
# various calculations...
return np.asarray(mv, dtype=DTYPE, order='C')
Nó biên dịch, nhưng trình biên dịch cho những điều sau cảnh báo:
/Users/vlad/anaconda/lib/python2.7/site-packages/numpy/core/include
/nump/npy_1_7_deprecated_api.h:15:2: warning:
"Using deprecated NumPy API, disable it by #defining NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
tôi đã thêm các chỉ thị đề xuất trong setup.py:
from distutils.core import setup, Extension
from Cython.Build import cythonize
import numpy
filename = 'agents3.pyx'
agents_module = Extension(
'Agents',
sources = [filename],
define_macros = [('NPY_NO_DEPRECATED_API', 'NPY_1_7_API_VERSION')],
include_dirs = [numpy.get_include()],
)
setup (name = 'Agents',
ext_modules = cythonize(agents_module)
)
Không w nó sẽ không biên dịch, nó nói:
Vlads-MacBook-Pro:program vlad$ python setup.py build_ext --inplace
Compiling agents3.pyx because it changed.
Cythonizing agents3.pyx
running build_ext
building 'Agents' extension
gcc -fno-strict-aliasing -I/Users/vlad/anaconda/include -arch x86_64 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -I/Users/vlad/anaconda/lib/python2.7/site-packages/numpy/core/include -I/Users/vlad/anaconda/include/python2.7 -c agents3.c -o build/temp.macosx-10.5-x86_64-2.7/agents3.o
agents3.c:2273:52: error: use of undeclared identifier 'NPY_C_CONTIGUOUS'
__pyx_t_2 = ((!(PyArray_CHKFLAGS(__pyx_v_self, NPY_C_CONTIGUOUS) != 0)) != 0);
^
agents3.c:2311:52: error: use of undeclared identifier 'NPY_F_CONTIGUOUS'
__pyx_t_1 = ((!(PyArray_CHKFLAGS(__pyx_v_self, NPY_F_CONTIGUOUS) != 0)) != 0);
^
agents3.c:2474:42: error: no member named 'descr' in 'struct tagPyArrayObject'
__pyx_t_4 = ((PyObject *)__pyx_v_self->descr);
~~~~~~~~~~~~^
agents3.c:4026:27: error: no member named 'base' in 'struct tagPyArrayObject'
Py_XDECREF(__pyx_v_arr->base);
~~~~~~~~~~~^
/Users/vlad/anaconda/include/python2.7/object.h:823:34: note: expanded from macro 'Py_XDECREF'
#define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
^
agents3.c:4026:27: error: no member named 'base' in 'struct tagPyArrayObject'
Py_XDECREF(__pyx_v_arr->base);
~~~~~~~~~~~^
/Users/vlad/anaconda/include/python2.7/object.h:823:64: note: expanded from macro 'Py_XDECREF'
#define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
^
/Users/vlad/anaconda/include/python2.7/object.h:772:24: note: expanded from macro 'Py_DECREF'
--((PyObject*)(op))->ob_refcnt != 0) \
^
agents3.c:4026:27: error: no member named 'base' in 'struct tagPyArrayObject'
Py_XDECREF(__pyx_v_arr->base);
~~~~~~~~~~~^
/Users/vlad/anaconda/include/python2.7/object.h:823:64: note: expanded from macro 'Py_XDECREF'
#define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
^
/Users/vlad/anaconda/include/python2.7/object.h:775:34: note: expanded from macro 'Py_DECREF'
_Py_Dealloc((PyObject *)(op)); \
^
/Users/vlad/anaconda/include/python2.7/object.h:762:15: note: expanded from macro '_Py_Dealloc'
(*Py_TYPE(op)->tp_dealloc)((PyObject *)(op)))
^
/Users/vlad/anaconda/include/python2.7/object.h:115:47: note: expanded from macro 'Py_TYPE'
#define Py_TYPE(ob) (((PyObject*)(ob))->ob_type)
^
agents3.c:4026:27: error: no member named 'base' in 'struct tagPyArrayObject'
Py_XDECREF(__pyx_v_arr->base);
~~~~~~~~~~~^
/Users/vlad/anaconda/include/python2.7/object.h:823:64: note: expanded from macro 'Py_XDECREF'
#define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
^
/Users/vlad/anaconda/include/python2.7/object.h:775:34: note: expanded from macro 'Py_DECREF'
_Py_Dealloc((PyObject *)(op)); \
^
/Users/vlad/anaconda/include/python2.7/object.h:762:45: note: expanded from macro '_Py_Dealloc'
(*Py_TYPE(op)->tp_dealloc)((PyObject *)(op)))
^
agents3.c:4035:16: error: no member named 'base' in 'struct tagPyArrayObject'
__pyx_v_arr->base = __pyx_v_baseptr;
~~~~~~~~~~~^
agents3.c:4070:30: error: no member named 'base' in 'struct tagPyArrayObject'
__pyx_t_1 = ((__pyx_v_arr->base == NULL) != 0);
~~~~~~~~~~~^
agents3.c:4093:44: error: no member named 'base' in 'struct tagPyArrayObject'
__Pyx_INCREF(((PyObject *)__pyx_v_arr->base));
~~~~~~~~~~~^
agents3.c:1065:37: note: expanded from macro '__Pyx_INCREF'
#define __Pyx_INCREF(r) Py_INCREF(r)
^
/Users/vlad/anaconda/include/python2.7/object.h:767:18: note: expanded from macro 'Py_INCREF'
((PyObject*)(op))->ob_refcnt++)
^
agents3.c:4094:41: error: no member named 'base' in 'struct tagPyArrayObject'
__pyx_r = ((PyObject *)__pyx_v_arr->base);
~~~~~~~~~~~^
11 errors generated.
error: command 'gcc' failed with exit status 1
Vlads-MacBook-Pro:program vlad$
Tôi nên làm gì? Có OK để rời khỏi cuộc gọi API không được chấp nhận vì nó không? Nó cố gắng để acces trường base - nhưng tôi không làm điều đó, đó là lỗi của Cython. Tôi chỉ đơn giản là chuyển đổi một bộ nhớ để một mảng numpy. Có cách nào khác, sạch hơn/an toàn hơn để làm việc đó không?
FWIW, tôi nhận được cùng cảnh báo. Nó vẫn chưa vỡ bất cứ thứ gì, vì vậy tôi bỏ qua chúng bây giờ. – perimosocordiae