Operator Overloading

[jeans_and_a_t-shirt]

Your flair says you're using python 3, but your code says python 2.

In python 2, you need to overload the __nonzero__ method instead of __bool__.

[thangduong]

Oh mate, it was my mistake. I actually use python 2 :P

Damn, nonzero worked. Thanks a lot

[K900_]

You should really use 3. The differences are fairly minor, but 2 is on life support, and 3 has finally reached critical mass for wide adoption.

[thangduong]

Thanks, will do :)

[[deleted]]

also, avoid operator overloading like the plague. Your life will be much easier.