def clean_up(self):
        """Do clean-up before returning buffer"""
        self.action_buffer = []
        self.sources = {}
        self.doc_to_get = {}
        self.doc_to_update = []
def clean_up ( self ) : self . action_buffer = [ ] self . sources = { } self . doc_to_get = { } self . doc_to_update = [ ]
Do clean-up before returning buffer