Replace __qualname__ in error messages

[Balint-R]

from pydsl.type import F32

class A:
    class B:
        pass

x = A.B()
print(type(x))
print(type(x).__qualname__)
print(type(x).__name__)

print(F32)
print(F32.__qualname__)
print(F32.__name__)

This outputs

<class '__main__.A.B'>
A.B
B
<class 'pydsl.type.F32'>
F32
F32

So I think for error messages, it is actually more useful to print type(x) instead of type(x).__qualname__. Oops. I thought type(x).__qualname__ was good, because it's better than type(x).__name__. But it seems the simplest solution of type(x) is actually even better.