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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 hashing_type(self, cluster='main'):
 """Hashing type of cluster."""

        if not self.config.has_section(cluster):
            raise SystemExit("Cluster '%s' not defined in %s"
                             % (cluster, self.config_file))
        hashing_type = 'carbon_ch'
        try:
            return self.config.get(cluster, 'hashing_type')
        except NoOptionError:
            return hashing_type