class_docstr: OneHot will convert `index` into a onehot vector.
code: def transform(self, t):
      self.output[:] = self.be.onehot(t, axis=0)
      return self.output
  
imports: from __future__ import division
  import numpy
  from neon import NervanaObject
label_desc: Use image node_id 2 for calling the OneHot obj's underlying member method code with example usage: obj.transform(t) and returns: self