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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def init(self):
 """ Initialize time domain simulation Returns ------- None """

        system = self.system
        config = self.config
        dae = self.system.dae
        if system.pflow.solved is False:
            return

        t, s = elapsed()

        # Assign indices for post-powerflow device variables
        system.xy_addr1()

        # Assign variable names for bus injections and line flows if enabled
        system.varname.resize_for_flows()
        system.varname.bus_line_names()

        # Reshape dae to retain power flow solutions
        system.dae.init1()

        # Initialize post-powerflow device variables
        for device, init1 in zip(system.devman.devices, system.call.init1):
            if init1:
                system.__dict__[device].init1(system.dae)

        # compute line and area flow
        if config.compute_flows:
            dae.init_fg()
            self.compute_flows()  # TODO: move to PowerSystem

        t, s = elapsed(t)

        if system.dae.n:
            logger.debug('Dynamic models initialized in {:s}.'.format(s))
        else:
            logger.debug('No dynamic model loaded.')

        # system.dae flags initialize
        system.dae.factorize = True
        system.dae.mu = 1.0
        system.dae.kg = 0.0