PyYAML doesn't use __float__, etc.

[craigyk@…]

I've noticed that PyYAML doesn't seem to respect the float, or other default type casters. This makes setting up serialization of some types trickier than it needs to be.

IE: I can convert a numpy array to nested lists easily using the tolist() method, but the values inside may still be one of the default bumpy types.... even though most of those types have a float method to cast the value...

I could add a bunch of yaml handlers, but that would be sub-optimal.