Python overloading multiple getitems / index requests

Question

I have a Grid class which I want to access using myGrid[1][2]. I know I can overload the first set of square brackets with the __getitem__() method, but what about the second.

I thought I could achieve this by having a helper class which also implements __getitem__ and then:

class Grid:

    def __init__(self)
        self.list = A TWO DIMENSIONAL LIST       

    ...

    def __getitem__(self, index):
        return GridIndexHelper(self, index)

class GridIndexHelper:

    def __init__(self, grid, index1):
        self.grid = grid
        self.index1 = index1

    ....

    def __getitem__(self, index):
        return self.grid.list[self.index1][index]

This seems a little too homebrewed... What is the python way to achieve this?

Answer 1

class Grid:

    def __init__(self):
        self.list = [[1,2], [3,4]]

    def __getitem__(self, index):
        return self.list[index]

g = Grid();

print g[0]
print g[1]
print g[0][1]

prints

[1, 2]
[3, 4]
2

Answer 2

As far as I know the way anajem mentions is the only way.

example:

class Grid(object):

def __init__(self):
    self.list = [[1, 2], [3, 4]]

def __getitem__(self, index):
    return self.list[index[0]][index[1]]

if __name__ == '__main__':
    mygrid = Grid()
    mygrid[1, 1] #How a call would look

Prints: 4

Does not operate exactly as you want it to but does the trick in my eyes.