code: def _sha256sum(input_file):
      """
      Return sha256 checksum of file given by path.
      """
  
      hasher = hashlib.sha256()
      with open(input_file, "rb") as file:
          for chunk in iter(lambda: file.read(65536), b""):
              hasher.update(chunk)
  
      return hasher.hexdigest()
  
imports: import hashlib
  import json
  import os
  from datetime import datetime
  from functools import partial
  from pathlib import Path
  from typing import Any
  from urllib.request import urlretrieve
  from pyproj._sync import get_proj_endpoint
  from pyproj.aoi import BBox
  from pyproj.datadir import get_data_dir, get_user_data_dir
label_desc: Use image node_id 7 for calling a global function with example usage: _sha256sum(input_file) and returns: hasher