<s> from django . dispatch import Signal <EOL> pre_save = Signal ( providing_args = [ '<STR_LIT>' , '<STR_LIT:action>' , ] ) <EOL> post_save = Signal ( providing_args = [ '<STR_LIT>' , '<STR_LIT:action>' , ] ) <EOL> pre_delete = Signal ( providing_args = [ '<STR_LIT>' , '<STR_LIT:action>' , ] ) <EOL> post_delete = Signal ( providing_args = [ '<STR_LIT>' , '<STR_LIT:action>' , ] ) </s>
