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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 print_paths(self):
 """Returns a string suitable for printing of the search path"""

        # Uses a list to get the order right
        ret = []
        for i in self._get_paths():
            if i not in ret:
                ret.append(i)
        return os.pathsep.join(ret)