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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 get(self, key, mem_map=True):
 """ Return the samples for the given key and the sampling-rate. Args: key (str):
 The key to read the data from. mem_map (bool):
 If ``True`` returns the data as memory-mapped array, otherwise a copy is returned. Note: The container has to be opened in advance. Returns: tuple: A tuple containing the samples as numpy array with ``np.float32`` [-1.0,1.0] and the sampling-rate. """

        self.raise_error_if_not_open()

        if key in self._file:
            data = self._file[key]
            sampling_rate = data.attrs[SAMPLING_RATE_ATTR]

            if not mem_map:
                data = data[()]

            data = np.float32(data) / MAX_INT16_VALUE

            return data, sampling_rate