old_contents: __all__ = ["SingleLayerRegularizer_ABC", "L1", "L2"]
  
  class SingleLayerRegularizer_ABC(object) :
  	"""An abstract regularization to be applied to a layer."""
  
  	def __init__(self, factor, *args, **kwargs) :
  		self.name = self.__class__.__name__
  		self.factor = factor
  		self.hyperparameters = ["factor"]
  
  	def getFormula(self, layer) :
  		"""Returns the expression to be added to the cost"""
  		raise NotImplemented("Must be implemented in child")
  
  class L1(SingleLayerRegularizer_ABC) :
  	"""
  	Will add this to the cost
  	.. math::
  		
  			factor * abs(Weights)
  	"""
  
  	def getFormula(self, layer) :
  		return self.factor * ( abs(layer.W).sum() )
  
  class L2(SingleLayerRegularizer_ABC) :
  	"""
  	Will add this to the cost
  	.. math::
  		
  			factor * (Weights)^2
  	"""
  
  	def getFormula(self, layer) :
  		return self.factor * ( abs(layer.W).sum() )
new_contents: __all__ = ["SingleLayerRegularizer_ABC", "L1", "L2"]
  
  class SingleLayerRegularizer_ABC(object) :
  	"""An abstract regularization to be applied to a layer."""
  
  	def __init__(self, factor, *args, **kwargs) :
  		self.name = self.__class__.__name__
  		self.factor = factor
  		self.hyperparameters = ["factor"]
  
  	def getFormula(self, layer) :
  		"""Returns the expression to be added to the cost"""
  		raise NotImplemented("Must be implemented in child")
  
  class L1(SingleLayerRegularizer_ABC) :
  	"""
  	Will add this to the cost
  	.. math::
  
  			factor * abs(Weights)
  	"""
  
  	def getFormula(self, layer) :
  		return self.factor * ( abs(layer.W).sum() )
  
  class L2(SingleLayerRegularizer_ABC) :
  	"""
  	Will add this to the cost
  	.. math::
  
  			factor * (Weights)^2
  	"""
  
  	def getFormula(self, layer) :
  		return self.factor * ( (layer.W * layer.W).sum() )
  
subject: Fix L2 formula that was mistakenly added as L1.