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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 run(self, low):
        '''
        Execute the specified function in the specified client by passing the
        lowstate
        '''
        # Eauth currently requires a running daemon and commands run through
        # this method require eauth so perform a quick check to raise a
        # more meaningful error.
        if not self._is_master_running():
            raise salt.exceptions.SaltDaemonNotRunning(
                    'Salt Master is not available.')

        if low.get('client') not in CLIENTS:
            raise salt.exceptions.SaltInvocationError(
                    'Invalid client specified: \'{0}\''.format(low.get('client')))

        if not ('token' in low or 'eauth' in low) and low['client'] != 'ssh':
            raise salt.exceptions.EauthAuthenticationError(
                    'No authentication credentials given')

        l_fun = getattr(self, low['client'])
        f_call = salt.utils.args.format_call(l_fun, low)
        return l_fun(*f_call.get('args', ()), **f_call.get('kwargs', {}))