AttributeError：“int”对象没有属性“encode”HDF5

Question

我正在尝试使用以下代码在 Python 中打开一个 HDF5 文件：

with h5py.File('example.hdf5', 'r') as f:
    ls = list(f.keys())
    dat = f.get('data')
    dt = np.array(dat)

但是，执行最后一行时出现此错误：

AttributeError: 'int' object has no attribute 'encode'

dat 有以下类：

h5py._hl.group.Group'

有人知道错误可能出在哪里吗？

在文件内部迭代的输出如下。如何访问文件的每个部分：

checking hdf5 file
/data is a Group
/data/model_cints is a Dataset
/hdf5_track_times is a Dataset
/meta is a Group
/meta/package is a Group
/meta/package/h5py is an object Dataset
/meta/package/numpy is an object Dataset
/meta/package/pypfilt is an object Dataset
/meta/package/python is an object Dataset
/meta/package/scipy is an object Dataset
/meta/package/toml is an object Dataset
/meta/param is a Group
/meta/param/component is a Group
/meta/param/component/model is an object Dataset
/meta/param/component/obs is a Group
/meta/param/component/obs/LatLon is an object Dataset
/meta/param/component/summary_table is a Group
/meta/param/component/summary_table/model_cints is an object Dataset
/meta/param/component/time is an object Dataset
/meta/param/data_dir is an object Dataset
/meta/param/hist is a Group
/meta/param/hist/extra_cols is a Dataset
/meta/param/hist/px_count is a Dataset
/meta/param/hist/wind_shift is a Dataset
/meta/param/hist/wind_size is a Dataset
/meta/param/last_n_periods is a Dataset
/meta/param/minimal_estimation_run is a Dataset
/meta/param/model is a Group
/meta/param/model/param_max is a Dataset
/meta/param/model/param_min is a Dataset
/meta/param/obs is a Group
/meta/param/obs/LatLon is a Group
/meta/param/obs/LatLon/sdev is a Dataset
/meta/param/out_dir is an object Dataset
/meta/param/prng_seed is a Dataset
/meta/param/random is an object Dataset
/meta/param/resample is a Group
/meta/param/resample/method is an object Dataset
/meta/param/resample/reg_toln is a Dataset
/meta/param/resample/regularisation is a Dataset
/meta/param/resample/regularise_or_fail is a Dataset
/meta/param/resample/threshold is a Dataset
/meta/param/scenario is a Group
/meta/param/scenario/id is an object Dataset
/meta/param/scenario/name is an object Dataset
/meta/param/steps_per_unit is a Dataset
/meta/param/summary is a Group
/meta/param/summary/from_first_day is a Dataset
/meta/param/summary/meta is a Group
/meta/param/summary/meta/packages is an object Dataset
/meta/param/summary/only_forecasts is a Dataset
/meta/param/time is a Group
/meta/param/time/start is a Dataset
/meta/param/time/until is a Dataset
/meta/param/tmp_dir is an object Dataset
/meta/prior is a Group
/meta/prior/lat is an object Dataset
/meta/prior/lon is an object Dataset
/meta/prior/speed_lat is an object Dataset
/meta/prior/speed_lon is an object Dataset
/meta/sim is a Group
/meta/sim/cmdline is an object Dataset

Answer 1

这是一个代码 sn-p 用于测试您的键的类型（组或数据集）。它使用visititems() 方法递归遍历文件中的节点，并将每个节点报告为 1) 组、2) 数据集、3) 对象数据集或 4) 未知。找到数据集后，您可以读取并创建 NumPy 数组。但是，这不是必需的。您可以使用 h5py 数据集对象“好像”它是一个 NumPy 数组。

def visitor_func(name, node):
    if isinstance(node, h5py.Group):
        print(node.name, 'is a Group')
    elif isinstance(node, h5py.Dataset):
       if (node.dtype == 'object') :
            print (node.name, 'is an object Dataset')
       else:
            print(node.name, 'is a Dataset')   
    else:
        print(node.name, 'is an unknown type')         

#####    

print ('checking hdf5 file')
with h5py.File('example.hdf5', 'r') as h5f:
    h5f.visititems(visitor_func)