docs: def bytes_to_long(s):
      """Convert a byte string to a long integer (big endian).
  
      In Python 3.2+, use the native method instead::
  
          >>> int.from_bytes(s, 'big')
  
      For instance::
  
          >>> int.from_bytes(b'\x00P', 'big')
          80
  
      This is (essentially) the inverse of :func:`long_to_bytes`.
      """
      acc = 0
      unpack = struct.unpack
      length = len(s)
      if length % 4:
          extra = (4 - length % 4)
          s = b'\000' * extra + s
          length = length + extra
      for i in range(0, length, 4):
          acc = (acc << 32) + unpack('>I', s[i:i + 4])[0]
      return acc