code: def seek(self, offset, whence=os.SEEK_SET):
          
          self.wrapped.seek(offset, whence)
docs: Sets the file's current position.
  
          :param offset: the offset to set
          :type offset: :class:`numbers.Integral`
          :param whence: see the docs of :meth:`file.seek()`.
                         default is :const:`os.SEEK_SET`