class_docstr: Class for loading data with batches 
class_docstr_tok: ["Class","for","loading","data","with","batches"]
code: def export_to_csv(self, path: str = None):
      if not path:
          path = self.path
          export_filename = f"meta_{os.path.basename(path)}.csv"
          export_dirname = os.path.dirname(path)
          self.meta_df.to_csv(
              os.path.join(export_dirname, export_filename)
          )
      else:
          self.meta_df.to_csv(os.path.abspath(path))
  
imports: import glob
  import json
  import os
  from abc import ABC, abstractmethod
  import pandas
label_desc: Use image node_id 5 for calling the BatchLoader obj's underlying member method code with example usage: obj.export_to_csv(path) without return types