Question

以下是我要完成的内容摘要：

将不透明的cstruct转换为python数组
Pickle the Array

我在说服cython让我将C对象转换为python对象方面遇到了问题。

这是代码的简化版本，令我头疼。这是文件myothermodule.pyx

cdef char* struct_to_string(structtype ctarg):
    cdef:
        bspmat *bsptarg
        list arrays = []
        np.ndarray[np.float64_t, ndim=2] arr
        char * string_data

    for i in range(ctarg.numlevel):
         bsptarg = ctarg.level[i]
         arr = bspmat_to_array(bsptarg) #this works fine in other contexts
         arrays.append(arr)

    cdef bytes pystr = cPickle.dumps(arrays, protocol=2) #fastest protocol
    string_data = <char *> pystr

    return string_data

此代码位于我的middle.pyx：

cdef push_data(mycythonstruct pv):
    cdef:
        cdef char * strdata
        cdef myothermodule.structtype *ctarg
    ctarg = pv.another_cython_struct
    strdata = myothermodule.struct_to_string( ctarg )

这是尝试编译时产生的错误类型：

middle.pyx:232:45: Cannot convert 'structtype *' to Python object

Error compiling Cython file:
------------------------------------------------------------

    [...]

    ctarg = pv.another_cython_struct
    strdata = myothermodule.struct_to_string( ctarg )
                                    ^
------------------------------------------------------------

middle.pyx:232:37: Obtaining 'char *' from temporary Python value
Traceback (most recent call last):
  File "setup.py", line 21, in <module>
    ext_modules = cythonize(extensions)
  File "/usr/local/lib/python2.7/dist-packages/Cython-0.20.1-py2.7-linux-x86_64.egg/Cython/Build/Dependencies.py", line 785, in cythonize
    cythonize_one(*args[1:])
  File "/usr/local/lib/python2.7/dist-packages/Cython-0.20.1-py2.7-linux-x86_64.egg/Cython/Build/Dependencies.py", line 902, in cythonize_one
    raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: middle.pyx

如何说服这个工作的任何线索将不胜感激！

将cstruct转换为python字符串

0 个答案: