In Python 2

print 3/2 outputs 1

In Python 3

print(3/2) outputs 1.5

Even a language that is regarded as well designed has unexpected behaviour, it's not necessarily wrong it's just not what the user expects.

They fixed it in 3 but does it's existence in 2 make Python a bad language?

PHP historically did a lot of stuff that a user wouldn't expect but they have started to clean that up, it won't happen overnight but the trend is there, strong and growing.

No such thing as a perfect programming language since everyone has a different definition of perfect.