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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 load_default_healthchecks(self):
 """ Loads healthchecks specified in settings.HEALTHCHECKS as dotted import paths to the classes. Defaults are listed in `DEFAULT_HEALTHCHECKS`. """

        default_healthchecks = getattr(settings, 'HEALTHCHECKS', DEFAULT_HEALTHCHECKS)
        for healthcheck in default_healthchecks:
            healthcheck = import_string(healthcheck)
            self.register_healthcheck(healthcheck)