Accessing a dictionary value by custom object value in Python?
- by Sam
So I have a square that's made up of a series of points. At every point there is a corresponding value.
What I want to do is build a dictionary like this:
class Point:
def __init__(self, x, y):
self._x = x
self._y = y
square = {}
for x in range(0, 5):
for y in range(0, 5):
point = Point(x,y)
square[point] = None
However, if I later create a new point object and try to access the value of the dictionary with the key of that point it doesn't work..
square[Point(2,2)]
Traceback (most recent call last):
File "<pyshell#19>", line 1, in <module>
square[Point(2,2)]
KeyError: <__main__.Point instance at 0x02E6C378>
I'm guessing that this is because python doesn't consider two objects with the same properties to be the same object? Is there any way around this? Thanks
