C struct python 等价物
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C struct python equivalent
提问by user1790813
I have this C code:
我有这个 C 代码：
typedef struct test * Test;
struct test {
void *a;
Test next;
};
How would you implement the equivalent to this in Python (if that is even possible)?
您将如何在 Python 中实现与此等效的功能（如果可能的话）？
采纳答案by phihag
In Python, you can assign objects of any type to a variable; so you can just use any class, like this:
在 Python 中，您可以将任何类型的对象分配给变量；所以你可以使用任何类，就像这样：
class test(object):
__slots__ = ['a', 'next']
x = test()
x.next = x
x.a = 42
Note that __slots__is optionaland should reduce memory overhead (it may also speed up attribute access). Also, you often want to create a constructor, like this:
请注意，这__slots__是可选的，应该减少内存开销（它还可以加快属性访问速度）。此外，您经常希望创建一个构造函数，如下所示：
class test(object):
def __init__(self, a, next):
self.a = a
self.next = next
x = test(21, None)
assert x.a == 21
If the class can be immutable, you may also want to have a look at namedtuple:
如果类可以是不可变的，您可能还想看看namedtuple：
import collections
test = collections.namedtuple('test', ['a', 'next'])
