class_docstr: Parametrized family of probability distributions
code: def pdfromflat(self, flat, mask, nsteps, size, is_act_model):
      return self.pdclass()(flat, mask, nsteps, size, is_act_model)
  
imports: import tensorflow.compat.v1
  from .util import fc
label_desc: Use image node_id 2 for calling the PdType obj's underlying member method code with example usage: obj.pdfromflat(flat, mask, nsteps, size, is_act_model) and returns: self