如何在python脚本中发送c api数组或结构 [英] How do I send a c api an array or struct in a python script

问题描述

我是python的新手，我似乎无法将数组或结构的参数从python脚本发送到c api。我已经发送了int和字符串确定。



我已经设法将python嵌入到调用python模块脚本的C中。我也在使用SWIG。我将使用python unitttest来测试对c api的调用。



我有一个很好的挖掘，所有简单的例子都将params显示为int或字符串。似乎没有发送数组或结构的示例。如何通过SWIG从python脚本将C数组或结构发送到c api？



是否有转换？我尝试发送simple_array = array（'i'，[8,9]）它是否在swig文件中？任何帮助表示赞赏！

Hi,

I am new to python and I can't seem to send array's or struct's params from a python script to a c api. I have sent int's and strings ok.

I have managed to embed python into C that calls a python module script. I am also using SWIG. I will be using python unitttest to test calls to c api's.

I have had a good dig around and all the simple examples show params as int's or strings. There seems no examples of sending arrays or structs. How do I send from a python script a C array or struct to a c api via SWIG?

Is there a conversion? I tried sending "simple_array=array('i',[8,9])" Is it in the swig file? Any help appreciated!

/*simple_api.c*/
#include <stdio.h>
int Simple_api_Connector_UTF_SimplePointerArrayWriteTestFunc(int *pArray);

int Simple_api_Connector_UTF_SimplePointerArrayWriteTestFunc(int *pArray)
{
	printf("Simple_api_Connector_UTF_SimpleArrayWriteTestFunc: array byte 1:%x array byte 2: %x\n", pArray[1], pArray[2]);

	return 1;
}

-----------

-----------

/*simple_api.i*/
%module simple_api
int Simple_api_Connector_UTF_SimplePointerArrayWriteTestFunc(int *pArray);

-----------

-----------

#py_test_python.py
#!/usr/bin/env python
'''py_test_python.py - Python source designed to '''
'''demonstrate the use of python embedding in and out'''

def py_test_python_func():
    simple_api.Simple_api_Connector_UTF_ArrayWriteTestFunc([1,2])#<- tried loads here but always an error! 

推荐答案

swig中有辅助函数来处理数组和向量。它应该使事情更容易处理。

http://www.swig。 org / Doc1.3 / SWIG.html＃SWIG_nn26 [ ^ ]

http：//www.swig .org / Doc2.0 / SWIGDocumentation.html＃Library_carrays [ ^ ]

There are helper functions in swig to handle arrays and vectors. It should make things easier to handle.
http://www.swig.org/Doc1.3/SWIG.html#SWIG_nn26[^]
http://www.swig.org/Doc2.0/SWIGDocumentation.html#Library_carrays[^]

谢谢。



我找到了一个工作类型图来转换数组变量在SWIG接口（.i）文件中，用于将一个int数组从python脚本写入c api：

Thanks.

I have found a working typemap to convert the array variable in the SWIG interface (.i) file that works for writing an int array from the python script to the c api:

//type map for an input int array, this will calculate the length
%typemap(in) (const int length_in, int *int_in_array) 
{
  int i;
  if (!PyList_Check(

input））
{
PyErr_SetString（PyExc_ValueError， 期待列表）;
return NULL;
}

input)) { PyErr_SetString(PyExc_ValueError, "Expecting a list"); return NULL; }

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