code: def addStampAnnot(self, rect, stamp=0):
          
          CheckParent(self)
  
          val = _fitz.Page_addStampAnnot(self, rect, stamp)
  
          if not val: return
          val.thisown = True
          val.parent = weakref.proxy(self)
          self._annot_refs[id(val)] = val
  
          return val
docs: Add a 'rubber stamp' in a rectangle.