python调用dll内函数,如何接受返回函数

c++生成动态dll,python调用该dll如何传参
这是dll链接

https://hhyq.lanzouf.com/ii5hY02amf3i

下面是c++函数代码

double* disp11(unsigned char* rev)
{
    union gyro
    {
        char ch[4];
        float f;
        int si;
    };
    union gyro Gyrox[4];
    unsigned short int data_temp1;
    int i, j;
    static double angleRT[16];
    unsigned short int YearMonth;     //年
    unsigned short int Product_ID_T; //产品编号

    i = 2;
    Product_ID_T = rev[2] + rev[3] * 256; //产品编号
    YearMonth = rev[4] + rev[5] * 256;      //年

    i = 11;
    j = 0;
    Gyrox[0].ch[0] = rev[i++]; //经度
    Gyrox[0].ch[1] = rev[i++];
    Gyrox[0].ch[2] = rev[i++];
    Gyrox[0].ch[3] = rev[i++];
    angleRT[0] = Gyrox[0].f;

    i = 15;
    j = 0;
    Gyrox[0].ch[j++] = rev[i++]; //纬度
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    angleRT[1] = Gyrox[0].f;
    i = 19;
    j = 0;
    Gyrox[0].ch[j++] = rev[i++]; //高度,m
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    angleRT[2] = Gyrox[0].f;

    i = 23;
    j = 0;
    Gyrox[0].ch[j++] = rev[i++]; //航向
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    angleRT[3] = Gyrox[0].f;

    i = 27;
    j = 0;
    Gyrox[0].ch[j++] = rev[i++]; //步数
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    Gyrox[0].ch[j++] = rev[i++];
    angleRT[4] = Gyrox[0].f;

    //步幅度,低字节
    data_temp1 = rev[32] * 256 + rev[31];
    angleRT[5] = (double)data_temp1;

    angleRT[6] = (double)rev[33];       //卫星数
    angleRT[7] = (double)rev[34];       //状态字1
    angleRT[8] = (double)rev[35];       //状态字2
    angleRT[9] = (double)Product_ID_T; //状态字2

    angleRT[10] = (double)YearMonth; //年
    angleRT[11] = (double)rev[6];     //月
    angleRT[12] = (double)rev[7];     //日
    angleRT[13] = (double)rev[8];     //时
    angleRT[14] = (double)rev[9];     //分
    angleRT[15] = (double)rev[10];     //秒

    return angleRT;
}

这是我使用python调用的代码

from ctypes import *
dll = CDLL('./Dll1.dll')
print(dir(dll))
print(dll.disp11([0xAA,0x55,0xAD,0x02,0xBC,0x08,0x01,0x06,0x08,0x00,0x00,0x08,0x33,0xD6,0x42,0xF0,0x97,0xEF,0x41,0x24,0x18,0xB7,0x43,0xEF,0x69,0x56,0x43,0x00,0x00,0x50,0x41,0xA8,0x02,0x00,0x00,0x01,0xEF]))

返回应该是个数组,但是接受到却是一个整数,我该如何取出dll返回参数

没有环境，没测试过，试试下面代码：

dll = CDLL('./Dll1.dll')
print(dir(dll))
dll.disp11.argtypes = [POINTER(c_char)]
dll.disp11.restype = POINTER(c_double)
res = dll.disp11([0xAA,0x55,0xAD,0x02,0xBC,0x08,0x01,0x06,0x08,0x00,0x00,0x08,0x33,0xD6,0x42,0xF0,0x97,0xEF,0x41,0x24,0x18,0xB7,0x43,0xEF,0x69,0x56,0x43,0x00,0x00,0x50,0x41,0xA8,0x02,0x00,0x00,0x01,0xEF])

print(res[0])
print(res[1])
print(res[2])
...
print(res[15])

先用argtypes确定各个参数的类型，然后传的时候再指定编码方式(encode写到参数项里就好)

array=dll.displl([0xAA,0x55,0xAD,0x02,0xBC,0x08,0x01,0x06,0x08,0x00,0x00,0x08,0x33,0xD6,0x42,0xF0,0x97,0xEF,0x41,0x24,0x18,0xB7,0x43,0xEF,0x69,0x56,0x43,0x00,0x00,0x50,0x41,0xA8,0x02,0x00,0x00,0x01,0xEF])

你需要先检查一下cdll内函数返回值类型，看起来类型不对

dll.disp11.restype

如果上面的类型是int，说明有问题，需要手动修改成指针

dll.disp11.restype=POINTER(c_double)
dll.disp11.argtypes=[POINTER(c_double)]

然后按照正常索引即可

result = dll.disp11((c_double*37)(xx,xx,xx))
result[0]
result[1]

from ctypes import *

ten = c_char*37#构造数组对象

a=CDLL(r"D:\Users\Desktop\Dll1.dll")

arg1=(
    0xAA,0x55,0xAD,0x02,0xBC,0x08,0x01,0x06,
    0x08,0x00,0x00,0x08,0x33,0xD6,0x42,0xF0,
    0x97,0xEF,0x41,0x24,0x18,0xB7,0x43,0xEF,
    0x69,0x56,0x43,0x00,0x00,0x50,0x41,0xA8,
    0x02,0x00,0x00,0x01,0xEF)

arg2=(170, 85, 173, 2, 188, 8, 1, 6,
      8, 0, 0, 8, 51, 214, 66, 240,
      151, 239, 65, 36, 24, 183, 67,
      239, 105, 86, 67, 0, 0, 80, 65,
      168, 2, 0, 0, 1, 239)

li=ten(*arg1)

a.disp11.restype = c_long*15

x=a.disp11(li)


print(list(x))

返回的数据是数组，如解决了问题，请采纳

from ctypes import *
dll = CDLL('./Dll1.dll')
print(dir(dll))
#print(dll.disp11([0xAA,0x55,0xAD,0x02,0xBC,0x08,0x01,0x06,0x08,0x00,0x00,0x08,0x33,0xD6,0x42,0xF0,0x97,0xEF,0x41,0x24,0x18,0xB7,0x43,0xEF,0x69,0x56,0x43,0x00,0x00,0x50,0x41,0xA8,0x02,0x00,0x00,0x01,0xEF]))
pfloat = dll.disp11([0xAA,0x55,0xAD,0x02,0xBC,0x08,0x01,0x06,0x08,0x00,0x00,0x08,0x33,0xD6,0x42,0xF0,0x97,0xEF,0x41,0x24,0x18,0xB7,0x43,0xEF,0x69,0x56,0x43,0x00,0x00,0x50,0x41,0xA8,0x02,0x00,0x00,0x01,0xEF])
i = 0
while i < 16:
    print(pfloat.contents[i])
    i += 1

https://download.csdn.net/download/weixin_38513665/13768057?spm=1005.2026.3001.5635&utm_medium=distribute.pc_relevant_ask_down.none-task-download-2~default~OPENSEARCH~Rate-5.pc_feed_download_top3ask&depth_1-utm_source=distribute.pc_relevant_ask_down.none-task-download-2~default~OPENSEARCH~Rate-5.pc_feed_download_top3ask

类中声明一个__str__函数，用来返回类的字符串输出格式
class face():
featurename = none
index = 1
instancename ='a-bushing_s-20151111-1'
isreferencerep = false
pointon = ((-1.268087, -19.208438, -16.0),)

def __str__(self):
    #这里你可以根据需要拼装s变量
    s = "({'featurename': none, 'index': 1, 'instancename': 'a-bushing_s-20151111-1', 'isreferencerep': false, 'pointon': ((-1.268087, -19.208438, -16.0),)})"
    return s

a = [face(),face()]
print(a[1])