old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  """File related utilities"""
  from __future__ import (absolute_import, print_function, unicode_literals)
  
  import hashlib
  import io
  from os import path
  from six import text_type
  from contracts import contract
  
  
  @contract(file_path='unicode')
  def write_md5(file_path=None):
      """Write a file containing a file's MD5 checksum"""
      with io.open('{0}'.format(file_path), "r", encoding='utf-8') as index_file:
          data = text_type(index_file.read())
          md5 = hashlib.md5(data.encode('utf-8')).hexdigest()
          print(md5.__class__.__name__)
      with io.open('{0}.md5'.format(file_path), "w", encoding='utf-8') as md5_file:
          md5_file.write(text_type(md5))
  
  
  @contract(file_path='unicode')
  def get_local_md5(file_path=None):
      """Get the MD5 value of a file's content."""
      if not path.exists('{0}.md5'.format(file_path)):
          return None
      with open('{0}.md5'.format(file_path, "r")) as existing_md5_file:
          return existing_md5_file.read()
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  """File related utilities"""
  from __future__ import (absolute_import, print_function, unicode_literals)
  
  import hashlib
  import io
  from os import path
  from six import text_type
  from contracts import contract
  
  
  @contract(file_path='unicode')
  def write_md5(file_path=None):
      """Write a file containing a file's MD5 checksum"""
      with io.open('{0}'.format(file_path), "r", encoding='utf-8') as index_file:
          data = text_type(index_file.read())
          md5 = hashlib.md5(data.encode('utf-8')).hexdigest()
          print(md5.__class__.__name__)
      with io.open('{0}.md5'.format(file_path), "w", encoding='utf-8') as md5_file:
          md5_file.write(text_type(md5))
  
  
  @contract(file_path='unicode')
  def get_local_md5(file_path=None):
      """Get the MD5 value of a file's content."""
      if not path.exists('{0}.md5'.format(file_path)):
          return None
      with open('{0}.md5'.format(file_path), "r") as existing_md5_file:
          return existing_md5_file.read()
  
subject: fix arguments for reading file md5.