[Python] Is there a way to get a Python dataclass length?

I have a dataclass for a set of timers. Each instance of the dataclass can have a different number of times. The number of timers in a specific instance is fixed but can vary between instances. I'd like to get the number of timers in a specific class using __len__. How can I specify the return value of __len__ with out resorting to a magic number like in my demo code? I'd rather it be generated programmatically when __len__ is called so there's no possibility of a maintenance error.

Here's my code:

@dataclass
class SSTimers():

def tic(self):
pass

def __iter__(self):
return iter([])

@dataclass
class Timers(SSTimers):
intervalTimer = tmr.Timer(0)
vSafetyPTimer = tmr.Timer(0)
aRefractoryTimer = tmr.Timer(0)
aBlankingTimer = tmr.Timer(0)
vRefractoryTimer = tmr.Timer(0)
vBlankingTimer = tmr.Timer(0)

def tic(self):
self.intervalTimer.tic()
self.vSafetyPTimer.tic()
self.aRefractoryTimer.tic()
self.aBlankingTimer.tic()
self.vRefractoryTimer.tic()
self.vBlankingTimer.tic()

def __len__(self):
return 6

def __iter__(self):
return iter([self.intervalTimer, self.vSafetyPTimer, self.aRefractoryTimer, self.aBlankingTimer, self.vRefractoryTimer, self.vBlankingTimer ])



I'd like len to return something like len(__iter__) if that makes any sense.

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