code: def read(self, size=None):
      
      if not self._is_open:
        raise IOError('Not opened.')
  
      if size is None:
        size = self._size - self._file_object.tell()
  
      return self._file_object.read(size)
docs: Reads a byte string from the file-like object at the current offset.
  
      The function will read a byte string of the specified size or
      all of the remaining data if no size was specified.
  
      Args:
        size (Optional[int]): number of bytes to read, where None is all
            remaining data.
  
      Returns:
        bytes: data read.
  
      Raises:
        IOError: if the read failed.
        OSError: if the read failed.