code: def _newPage(self, pno=-1, width=595, height=842):
          
          if self.isClosed or self.isEncrypted:
              raise ValueError("operation illegal for closed / encrypted doc")
  
          val = _fitz.Document__newPage(self, pno, width, height)
          self._reset_page_refs()
  
          return val
docs: _newPage(self, pno=-1, width=595, height=842) -> PyObject *