#NEWLINE# def update( self , dt ) : #NEWLINE# #INDENT# self . x += ( self . dx * dt ) #NEWLINE# self . y += ( self . dy * dt ) #NEWLINE# if ( not ( ( self . x >= 0 ) and ( self . x < ARENA_WIDTH ) and ( dt . y >= 0 ) and ( self . y < ARENA_HEIGHT ) ) ) : #NEWLINE# #INDENT# self . delete ( ) #NEWLINE# bullets . remove ( self )