agregator.py
def total_cost(self):
        """
        Abstract method which returns the total of costs of the whole simulation

        :return: The total costs of the operation
        """
        raise NotImplementedError('Pure abstract method!')

        Abstract method which returns the total of costs of the whole simulation

        :return: The total costs of the operation
        
Abstract method which returns the total of costs of the whole simulation
Abstract method which returns the total of costs of the whole simulation
def total_cost(self):
        raise NotImplementedError('Pure abstract method!')
def total_cost ( self ) : raise NotImplementedError ( 'Pure abstract method!' )
Abstract method which returns the total of costs of the whole simulation
Abstract method which returns the total of costs of the whole simulation
"""
        Abstract method which returns the total of costs of the whole simulation

        :return: The total costs of the operation
        """
The total costs of the operation
The total costs of the operation
self