code: def __init__(self, fname=None, verbose=True):
      self.fname = fname or pjoin(
          tempfile.gettempdir(), f"dft.{getpass.getuser()}.sqlite"
      )
      self.verbose = verbose
  
imports: import contextlib
  import getpass
  import logging
  import os
  import sqlite3
  import tempfile
  import warnings
  from io import BytesIO
  from os.path import join
  import numpy
  from nibabel.optpkg import optional_package
  from .nifti1 import Nifti1Header
label_desc: Use image node_id 1 to create a new _DB object  with example: obj = _DB(fname, verbose)