class_docstr: ernie model 
class_docstr_tok: ["ernie","model"]
docstr: train 
docstr_tok: ["train"]
code: def train(self):
      """train"""
      if paddle.in_dynamic_mode():
          super(ErnieModel, self).train()
      self.training = True
      for l in self.sublayers():
          l.training = True
      return self
  
imports: import logging
  import re
  import time
  import paddle
  from paddle import nn
  from paddle.nn import functional
label_desc: Use image node_id 4 for calling the ErnieModel obj's underlying member method code with example usage: obj.train() and returns: self