Hello, I'm studying algorithom. For concentrating on the question itself, I
intend to use Python to implement the algorithoms.

Now, I want to write a Red-Black Tree, and a List structure. In C/C++, I can use pointers to refer to children notes (or next notes). But, in Python, how
can I do it? Except the sequence, I know not any way.

You'd better help me understan how can I transform the following C code into
Python:

/* a List */
struct {
 int data;
 int *next;
 int *prev;
}

That's all. Thanks!
Kermit

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