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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 add_config_path(self, path):
 """Add a path for Vyper to search for the config file in. Can be called multiple times to define multiple search paths. """

        abspath = util.abs_pathify(path)
        if abspath not in self._config_paths:
            log.info("Adding {0} to paths to search".format(abspath))
            self._config_paths.append(abspath)