class_docstr: Generic trainer class for ESPnet training!
code: def collect_stats(self):
      if not os.path.exists(self.stats_dir):
          os.makedirs(self.stats_dir)
  
      self.train_config.collect_stats = True
      self.train_config.output_dir = self.stats_dir
      self.train_config.train_shape_file = []
      self.train_config.valid_shape_file = []
  
      self.task_class.main(self.train_config)
  
imports: import glob
  import os
  from argparse import Namespace
  from espnetez.task import get_easy_task
label_desc: Use image node_id 3 for calling the Trainer obj's underlying member method code with example usage: obj.collect_stats() without return types