@vishruthir3555 , Hi , we can extract if it is saving under Page or Pagelist property in pyWorkPage.
For Instance, If TPAccountRef is one of the property of aggregate proprty I.E Page oo List of name Account. Then, it would be saved in clipboard>>pyWorkPage>>Account>>TPAccountRef.
Now for Extract rule, which is create under 'Work' class on click on gear icon, you will get that pagelist and with in that page list you should find the property. By adding this you will get the data related to it.