code: def read_stdin(self):
          
          text = sys.stdin.read()
  
          # Decode the bytes returned from earlier Python STDIN implementations
          if sys.version_info[0] < 3 and text is not None:
              text = text.decode(sys.stdin.encoding or 'utf-8')
  
          return text
docs: Reads STDIN until the end of input and returns a unicode string.