问题引发:如何使用python的工会?
我刚刚开始使用python,我想知道如何用python定义联合(使用ctypes)?希望我通过ctypes支持工会是对的。例如,以下c代码是如何在python中的
struct test { char something[10]; int status; }; struct test2 { char else[10]; int status; int alive; }; union tests { struct test a; struct test2 b; }; struct tester { char more_chars[20]; int magic; union tests f; };
Thx,如果其他人正在寻找相同的答案,则添加简单示例
from ctypes import * class POINT(Structure): _fields_ = [("x", c_int), ("y", c_int)] class POINT_1(Structure): _fields_ = [("x", c_int), ("y", c_int), ("z",c_int)] class POINT_UNION(Union): _fields_ = [("a", POINT), ("b", POINT_1)] class TEST(Structure): _fields_ = [("magic", c_int), ("my_union", POINT_UNION)] testing = TEST() testing.magic = 10; testing.my_union.b.x=100 testing.my_union.b.y=200 testing.my_union.b.z=300
解决方案
看一下ctypes教程:可以使用ctypes.Union类:
class test(ctypes.Structure): # ... class test2(ctypes.Structure): # ... class tests(ctypes.Union): _fields_ = [("a", test), ("b", test2)]