code: def _downloader(start, end, url, filename):
      import requests
  
      headers = {"Range": "bytes=%d-%d" % (start, end)}
      r = requests.get(url, headers=headers, stream=True)
      with open(filename, "r+b") as fp:
          fp.seek(start)
          var = fp.tell()
          fp.write(r.content)
  
file_path: MMdnn/mmdnn/conversion/common/utils.py
imports: from __future__ import division
  import os
  import sys
  import numpy
  from six import text_type, binary_type, integer_types
  import mmdnn.conversion.common.IR.graph_pb2
label_desc: Use image node_id 12 for calling a global function with example usage: _downloader(start, end, url, filename) without return types