I have this C code:
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)?
1 Answer
In Python, you can assign objects of any type to a variable; so you can just use any class, like this:
class test(object):
__slots__ = ['a', 'next']
x = test()
x.next = x
x.a = 42
Note that __slots__ is optional and should reduce memory overhead (it may also speed up attribute access). Also, you often want to create a constructor, like this:
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:
import collections
test = collections.namedtuple('test', ['a', 'next'])
1 Comment
mgilson
I'm not positive that
__slots__ makes the code run any faster in general (although I suppose it might). Generally it is used to save memory if you're going to be instantiating hordes of simple objects.
float a; char *b; void *f; double t;?