Is there a more efficient way to write a really long "if elif" chain in python?

I quite a beginner to real programming languages and I am using Python to write a long if elif chain to check x and y variables as coordinates and depending on the coordinates it would do something different. (This is for a text-based adventure game)

This is what I have now and I was wondering how I could do it in a much nicer way.

if x == 1 and y == 1:
    dothis()
elif x == 1 and y == 2:
    dothat()
elif x == 1 and y == 3:
    doANewThing()
elif x == 1 and y == 3:
    doSomethingDif()

Except this appears over 900 times. I hate it. Please Help.