class DebugInterface (object):
    """Defines general interface for debugging operations"""
    def print_event (self, event):
        raise NotImplementedError("Functions needs to be implemented")

    def print_forecast (self, forecast):
        raise NotImplementedError("Functions needs to be implemented")

    def print_line (self, content):
        raise NotImplementedError("Functions needs to be implemented")

    def print_err (self, exception, msg=""):
        raise NotImplementedError("Functions needs to be implemented")