old_contents: import sys
  
  def binary_stdin():
      """
      Get a file object for reading binary bytes from stdin instead of text.
      Compatible with Py2/3, POSIX & win32.
      Credits: https://stackoverflow.com/a/38939320/531179 (CC BY-SA 3.0)
      """
      if hasattr(sys.stdin, 'buffer'): # Py3+
          return sys.stdin.buffer
      else:
          if sys.platform == 'win32':
              import os, msvcrt
              msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
          return sys.stdin
  
new_contents: import sys
  
  
  def binary_stdin():
      """
      Get a file object for reading binary bytes from stdin instead of text.
      Compatible with Py2/3, POSIX & win32.
      Credits: https://stackoverflow.com/a/38939320/531179 (CC BY-SA 3.0)
      """
      if hasattr(sys.stdin, 'buffer'):  # Py3+
          return sys.stdin.buffer
      else:
          if sys.platform == 'win32':
              import os, msvcrt
              msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
          return sys.stdin
  
subject: Enhance PEP8