Linux下 Python通过ctypes调用C API （二）

关于python与C混编的（数组类型）参数和返回值传递
1.python向C中传递数组参数
helloWorld.c#include<stdio.h>
void test(int input[])
{
printf("Hello World!\n");
int i=0;
for(i=0;i<2;i++){
printf("%d ",input[i]);
}
}main.pyfrom ctypes import *
so = CDLL("./libhello.so")

INPUT = c_int * 2
input = INPUT()
input[0] = 1
input[1] = 2

p = so.test(input)
2-0.C返回数组指针给python程序(在python中用结构体指针接收)
helloWorld.c#include<stdio.h>
int * test(int input[])
{
static int a[]={4,2};
printf("Hello World!\n");
int i=0;
for(i=0;i<2;i++){
printf("%d ",input[i]);
}
return a;
}main.pyfrom ctypes import *
so = CDLL("./libhello.so")
class StructPointer(Structure):
_fields_ = [("a", c_int), ("b", c_int)]

INPUT = c_int * 2
input = INPUT()
input[0] = 1
input[1] = 2

so.test.restype = POINTER(StructPointer)
p = so.test(input)
print(p.contents.a)
print(p.contents.b)2-1.C返回数组指针给python程序(在python中用ctypes数组接收)
main.py
from ctypes import *
so = CDLL("./libhello.so")

INPUT = c_int * 2
input = INPUT()
input[0] = 1
input[1] = 2

so.test.restype = POINTER(INPUT)
p = so.test(input)
print(p.contents)
#output：<__main__.c_int_Array_2 object at 0x7f88c31a12f0>
p.contents[0]
p.contents[1]