How to get the last value from line in next()?

[pizza]

Hello! This is my indicator

class TestIndicator(bt.Indicator):
	...
	def next(self):
		dynamic_period = get_dynamic_period(self.data) 
		sma = bt.indicators.SMA(self.data, period=dynamic_period)

		last_value = sma.get(-1)  
		self.lines.dynamic_sma[0] = last_value # not work
		

How to get the last value from line in next()?
Thanks !

[pizza]

correction:

class TestIndicator(bt.Indicator):
	...
	def next(self):
		dynamic_period = get_dynamic_period(self.data) 
		sma = bt.indicators.SMA(self.data.close.get(0, self.p.data_period), period=dynamic_period)

		last_value = sma.get(-1)  
		self.lines.dynamic_sma[0] = last_value # not work

[run-out]

@pizza You don't have a good grasp on using init and/or next. Please have a look here. https://www.backtrader.com/docu/induse/

[pizza]

@run-out Thanks!