code: def _get_source_data(self, file_path: Path) -> pd.DataFrame:
      df = pd.read_csv(str(file_path.resolve()), low_memory=False)
      df[self.date_field_name] = (
          df[self.date_field_name].astype(str).astype("datetime64[ns]")
      )
      # df.drop_duplicates([self.date_field_name], inplace=True)
      return df
  
imports: import abc
  import shutil
  import traceback
  from pathlib import Path
  from typing import Iterable, List, Union
  from functools import partial
  from concurrent.futures import ThreadPoolExecutor, as_completed, ProcessPoolExecutor
  import fire
  import numpy
  import pandas
  from tqdm import tqdm
  from loguru import logger
  from qlib.utils import fname_to_code, code_to_fname
label_desc: Use image node_id 5 for calling the DumpDataBase obj's underlying member method code with example usage: obj._get_source_data(file_path) and returns: df