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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 _is_reachable(self, server):
 """Checks if the given redis server is reachable"""


        try:
            server['redis'].ping()
            return True
        except UserWarning:
            self._logger.warn('Cannot reach redis server: ' + server['url'])
        except Exception:
            self._logger.warn('Cannot reach redis server: ' + server['url'])

        return False