bark.py 文件源码

def write_sampled(datfile, data, sampling_rate, **params):
    """Writes a sampled dataset to disk as a raw binary file, plus a meta file.

    Args:
        datfile (str): path to file to write to. If the file exists, it is
            overwritten.
        data (sequence): time series data of at most 2 dimensions
        sampling_rate (int or float): sampling rate of `data`
        **params: all other keyword arguments are treated as dataset attributes,
            and added to the meta file

    Returns:
        SampledData: sampled dataset containing `data`
    """
    if 'columns' not in params:
        params['columns'] = sampled_columns(data)
    params["dtype"] = data.dtype.str
    shape = data.shape
    mdata = np.memmap(datfile, dtype=params["dtype"], mode="w+", shape=shape)
    mdata[:] = data[:]
    write_metadata(datfile, sampling_rate=sampling_rate, **params)
    params['sampling_rate'] = sampling_rate
    return SampledData(mdata, datfile, params)