访问类实例位于其中的数组的类方法

Question

Using python 2.7- I have a file, main.py , that does something like

from tile import Tile
l = [Tile(), Tile(), Tile()]

where tile.py contains the Tile class. I need the Tile class to access l in the main file. For example, I could:

• Write a method in Tile that returns the instance of Tile before it in the list.
• I could write a method from within Tile that returns all the other Tile instances in the list it's in.

These would work no matter what list the class instance was in. Is this possible to do in python?

EDIT

---

Exactly what I'm trying to do: I have a Tile class. world is a 2D array, a list of lists. The lists have Tile class objects. I'm trying to implement a method of Tile , returnNeighbors() , that returns the tiles to the top, bottom, left and right in the array.

Answer 1

There is no way you can access the list from inside the class unless you pass it as a function. You could try that, but as others have mentioned, this generally means that the design is bad and you should rethink it.

<inside the class Tile>
# function for the first use-case in your question
def your_function(self, your_list):
    return your_list[your_list.index(self) -1]

# second use-case
def your_other_function(self, your_list):
    temp = your_list
    temp.remove(self)
    return temp