ValueError for RAML type `number` and value of `nan` or `inf`

[schuderer]

• ML Launchpad version: 1.0.0
• Model Type used: Python
• DataSource type(s) used: CSV
• Python version: 3.x
• Operating System: n/a

Description

Python and Numpy numeric formats allow for nan of +/-inf values.

But running the Iris example (tree_*) REST API with a numeric parameter like petal_width=nan produces

ValueError: Input contains NaN, infinity or a value too large for dtype('float32').

(a 505 in an WSGI application)

Steps to reproduce

cd examples
mllaunchpad -c tree_cfg.yml api
curl http://127.0.0.1:5000/iris/v0/mythings?sepal.length=5.6&sepal.width=2.7&petal.length=4.2&petal.width=nan
# --> ValueError: Input contains NaN, infinity or a value too large for dtype('float32').

(submitted for a user)