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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 create_endpoints_csv_file(self, timeout=-1):
 """ Creates an endpoints CSV file for a SAN. Args: timeout: Timeout in seconds. Wait for task completion by default. The timeout does not abort the operation in OneView, just stops waiting for its completion. Returns: dict: Endpoint CSV File Response. """

        uri = "{}/endpoints/".format(self.data["uri"])
        return self._helper.do_post(uri, {}, timeout, None)