python:c-struct 和 wintypes

Question

我正在尝试实现一个 python 接口(interface)。我对 c 结构的定义有疑问。如何在主结构中生成内部结构(LinV)？

手册中的定义:

typedef struct
{
float MaxExcitation;

struct LinVal
    {
    double MeasValue;
    double RefValue;
    } LinV[SEN_LIN_DATA_MAX];
} Data;

python 代码:

class LinV(Structure):
    _fields_ = [('NeasValue', c_double),
                ('RefValue', c_double)]


class Data(Structure):
    _fields_ = [('MaxExcitation', c_float),
                ('LinV', ???????)]

谢谢马库斯

Answer 1

你只需乘以指定数组:

from ctypes import *

SEN_LIN_DATA_MAX = 3

class LinV(Structure):
    _fields_ = [('NeasValue', c_double),
                ('RefValue', c_double)]


class Data(Structure):
    _fields_ = [('MaxExcitation', c_float),
                ('LinV', LinV * SEN_LIN_DATA_MAX)]

d = Data(2.0,
   (LinV(1.2, 3.2),
    LinV(2.2, 2.2), 
    LinV(3.2, 1.2),
))