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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(self):
 """Load configuration from the defined locations."""

        if not self.loaded:
            self.values = configobj.ConfigObj({}, **self.DEFAULT_CONFIG_OPTS)
            for path in self.locations():
                try:
                    part = configobj.ConfigObj(infile=path, **self.DEFAULT_CONFIG_OPTS)
                except configobj.ConfigObjError as cause:
                    raise LoggedFailure("Error in file '{path}': {cause}".format(path=pretty_path(path), cause=cause))
                self.values.merge(part)
            self.loaded = True
        return self.values