Which Trigger get fired after a file get removed from an attachment of a doctype?

Currently i am appending file in my Attachment Table(Child Table) of a doctype, now when i remove attachment from Sidebar attachment, row needs to be removed from the table. Row is getting removed from data base as i wrote python code, but i have to refresh the document to see the removed row.
So, which trigger event i need to use to refresh form when i remove file from the attachment? or if u have any other idea then it would be very helpfull.

Please help