Types 将cstruct转换为python字符串

以下是我要完成的工作的总结：

将不透明的cstruct转换为python数组

对阵列进行酸洗

我在说服cython让我将C对象转换成python对象方面遇到了问题

这是一个让我头疼的简化版代码。 这在myothermodule.pyx文件中

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

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

middle.pyx:232:45:无法将“structtype*”转换为Python对象
编译Cython文件时出错：
------------------------------------------------------------
[...]
ctarg=pv.另一个cython结构
strdata=myothermodule.struct_to_string（ctarg）
^
------------------------------------------------------------
middle.pyx:232:37:从临时Python值中获取“char*”
回溯（最近一次呼叫最后一次）：
文件“setup.py”，第21行，在
ext_modules=cythonize（扩展）
cythonize中的文件“/usr/local/lib/python2.7/dist packages/Cython-0.20.1-py2.7-linux-x86_64.egg/Cython/Build/Dependencies.py”，第785行
cythonize_one（*args[1:]
文件“/usr/local/lib/python2.7/dist packages/Cython-0.20.1-py2.7-linux-x86_64.egg/Cython/Build/Dependencies.py”，第902行，在cythonize_one中
raise编译器错误（无，pyx_文件）
Cython.Compiler.Errors.CompileError:middle.pyx

---

任何关于如何说服这项工作的线索都将不胜感激

第一个错误与

structtype

和

structtype*

之间的差异有关。您可以通过将

cdef char*struct\u的定义更改为_string（structtype*ctarg）

来解决这个问题（但很难确定，因为您没有提供

structtype

的定义）（实际上，我认为这可能不是导致第一条错误消息的原因，但这肯定是个问题）是否有定义为

structtype

和

struct\u to\u string

的myothermodule.pxd，然后在middle.pyx中定义

cimport myothermodule

？并且应该

myothermodule.struct\u到字符串（ctarg）

是

myothermodule.struct\u到字符串（ctarg[0]）

即不是指针？

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