old_contents: # -*- coding: utf-8 -*-
  
  import hashlib
  import json
  import os
  import tempfile
  from qiniu.compat import is_py2, is_py3
  
  
  class UploadProgressRecorder(object):
      """持久化上传记录类
  
      该类默认保存每个文件的上传记录到文件系统中，用于断点续传
      上传记录为json格式：
      {
          "size": file_size,
          "offset": upload_offset,
          "modify_time": file_modify_time,
          "contexts": contexts
      }
  
      Attributes:
          record_folder: 保存上传记录的目录
      """
  
      def __init__(self, record_folder=tempfile.gettempdir()):
          self.record_folder = record_folder
  
      def get_upload_record(self, file_name, key):
          record_key = '{0}/{1}'.format(key, file_name)
          if is_py2:
              record_file_name = hashlib.md5(record_key).hexdigest()
          else:
              record_file_name = hashlib.md5(record_key.encode('utf-8')).hexdigest()
  
          upload_record_file_path = os.path.join(self.record_folder, record_file_name)
          if not os.path.isfile(upload_record_file_path):
              return None
          with open(upload_record_file_path, 'r') as f:
              json_data = json.load(f)
          return json_data
  
      def set_upload_record(self, file_name, key, data):
          record_key = '{0}/{1}'.format(key, file_name)
          if is_py2:
              record_file_name = hashlib.md5(record_key).hexdigest()
          else:
              record_file_name = hashlib.md5(record_key.encode('utf-8')).hexdigest()
  
          upload_record_file_path = os.path.join(self.record_folder, record_file_name)
          with open(upload_record_file_path, 'w') as f:
              json.dump(data, f)
  
      def delete_upload_record(self, file_name, key):
          record_key = '{0}/{1}'.format(key, file_name)
          if is_py2:
              record_file_name = hashlib.md5(record_key).hexdigest()
          else:
              record_file_name = hashlib.md5(record_key.encode('utf-8')).hexdigest()
  
          upload_record_file_path = os.path.join(self.record_folder, record_file_name)
          os.remove(upload_record_file_path)
  
new_contents: # -*- coding: utf-8 -*-
  
  import hashlib
  import json
  import os
  import tempfile
  from qiniu.compat import is_py2
  
  
  class UploadProgressRecorder(object):
      """持久化上传记录类
  
      该类默认保存每个文件的上传记录到文件系统中，用于断点续传
      上传记录为json格式：
      {
          "size": file_size,
          "offset": upload_offset,
          "modify_time": file_modify_time,
          "contexts": contexts
      }
  
      Attributes:
          record_folder: 保存上传记录的目录
      """
  
      def __init__(self, record_folder=tempfile.gettempdir()):
          self.record_folder = record_folder
  
      def get_upload_record(self, file_name, key):
          record_key = '{0}/{1}'.format(key, file_name)
          if is_py2:
              record_file_name = hashlib.md5(record_key).hexdigest()
          else:
              record_file_name = hashlib.md5(record_key.encode('utf-8')).hexdigest()
  
          upload_record_file_path = os.path.join(self.record_folder, record_file_name)
          if not os.path.isfile(upload_record_file_path):
              return None
          with open(upload_record_file_path, 'r') as f:
              json_data = json.load(f)
          return json_data
  
      def set_upload_record(self, file_name, key, data):
          record_key = '{0}/{1}'.format(key, file_name)
          if is_py2:
              record_file_name = hashlib.md5(record_key).hexdigest()
          else:
              record_file_name = hashlib.md5(record_key.encode('utf-8')).hexdigest()
  
          upload_record_file_path = os.path.join(self.record_folder, record_file_name)
          with open(upload_record_file_path, 'w') as f:
              json.dump(data, f)
  
      def delete_upload_record(self, file_name, key):
          record_key = '{0}/{1}'.format(key, file_name)
          if is_py2:
              record_file_name = hashlib.md5(record_key).hexdigest()
          else:
              record_file_name = hashlib.md5(record_key.encode('utf-8')).hexdigest()
  
          upload_record_file_path = os.path.join(self.record_folder, record_file_name)
          os.remove(upload_record_file_path)
  
subject: remove unused import