class_docstr: Pixelwise SoftMax activation function.
  Computes the function f(x_k) = exp(x_k) / sum_i(exp(x_i))
code: def __call__(self, x):
      y = x.reshape((self.c, -1))
      y[:] = self.be.reciprocal(
          self.be.sum(self.be.exp(y - self.be.max(y, axis=0)), axis=0)
      ) * self.be.exp(y - self.be.max(y, axis=0))
      return x
  
imports: from __future__ import division
  from neon.transforms.transform import Transform
label_desc: Use image node_id 2 for calling the PixelwiseSoftmax obj's underlying member method code with example usage: obj.__call__(x) and returns: x