class_docstr: Restricted  Boltzmann Machine
class_docstr_tok: ["Restricted","Boltzmann","Machine"]
docstr: Initialize the placeholders for the visible units
docstr_tok: ["Initialize","the","placeholders","for","the","visible","units"]
code: def placeholder(self):
      """Initialize the placeholders for the visible units"""
      self.vu = tf.compat.v1.placeholder(
          shape=[None, self.n_visible], dtype="float32"
      )
  
imports: import numpy
  import tensorflow
  import logging
  import os
  from pathlib import Path
label_desc: Use image node_id 6 for calling the RBM obj's underlying member method code with example usage: obj.placeholder() without return types