1、 在python中调用C语言生成的动态库， 返回结构体指针 ，并进行输出！
mylib.c (动态库源代码)
- // 编译生成动态库: gcc -g -fPIC -shared -o libtest.so test.c
- #include
- #include
- #include
- typedef struct StructPointerTest
- {
- char name[20];
- int age;
- }StructPointerTest, *StructPointer;
- StructPointer testfunction() // 返回结构体指针
- {
- StructPointer p = (StructPointer)malloc(sizeof(StructPointerTest));
- strcpy(p->name, "Joe");
- p->age = 20;
- return p;
- }
编译：gcc -g -fPIC -shared -o libmylib.so test.c
call.py(python调用C语言生成的动态库):
[python] view plain copy
- #!/bin/env python
- # coding=UTF-8
- from ctypes import *
- #python中结构体定义
- class StructPointer(Structure):
- _fields_ = [("name", c_char * 20), ("age", c_int)]
- if __name__ == "__main__":
- lib = cdll.LoadLibrary("./libmylib.so")
- lib.testfunction.restype = POINTER(StructPointer) #指定函数返回值的数据结构
- p = lib.testfunction()
- print "%s: %d" %(, p.contents.age)
最后运行结果：
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- [zcm@c_py #112]$make clean
- rm -f *.o libmylib.so
- [zcm@c_py #113]$make
- gcc -g -fPIC -shared -o libmylib.so test.c
- [zcm@c_py #114]$./call.py
- Joe: 20
- [zcm@c_py #115]$
2、结构体嵌套
Python Code
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##python 文件
##文件名 pytest.py import ctypes mylib = ctypes.cdll.LoadLibrary( "cpptest.so") class sub_struct(ctypes.Structure): #子结构体 _fields_ = [ ( "test_char_p",ctypes.c_char_p), ( "test_int",ctypes.c_int) ] class struct_def(ctypes.Structure): _fields_ = [ ( "stru_string",ctypes.c_char_p), ( "stru_int", ctypes.c_int), ( "stru_arr_num", ctypes.c_char* 4), ("son_struct", sub_struct)#嵌套子结构体的名称（ son_struct） 和结构（ sub_struct） ] |
