如何使用Python来检索HDF5文件

Question

我有很多.dat格式文件，文件内部结构构造为hdf5结构，它有不同的数据组。现在我需要一些如何检索内部数据作为表来查看这些数据。我试图使用h5py来读取文件并将其放入pandas数据帧，但不幸的是有一些错误，是否有人可以为我提供一些解决此问题的示例？

import h5py
import pandas as pa

with h5py.File("01.dat") as f:
    rdata = f.value[-1]

print rdata

This method also tried, but same error.

with h5py.File('01.dat','r') as hf:
    print('List of arrays in this file: \n', hf.keys())

下面的错误，看起来无法读取01.dat文件。

C:\Anaconda2\python.exe C:/Users/FLU2/PycharmProjects/Dask/Dask.py
Traceback (most recent call last):
  File "C:/Users/FLU2/PycharmProjects/Dask/Dask.py", line 4, in <module>
    with h5py.File("01.dat") as f:
  File "C:\Anaconda2\lib\site-packages\h5py\_hl\files.py", line 260, in __init__
    fid = make_fid(name, mode, userblock_size, fapl, swmr=swmr)
  File "C:\Anaconda2\lib\site-packages\h5py\_hl\files.py", line 114, in make_fid
    fid = h5f.create(name, h5f.ACC_EXCL, fapl=fapl, fcpl=fcpl)
  File "h5py\_objects.pyx", line 54, in h5py._objects.with_phil.wrapper (C:\aroot\work\h5py\_objects.c:2584)
  File "h5py\_objects.pyx", line 55, in h5py._objects.with_phil.wrapper (C:\aroot\work\h5py\_objects.c:2543)
  File "h5py\h5f.pyx", line 96, in h5py.h5f.create (C:\aroot\work\h5py\h5f.c:1994)
IOError: Unable to create file (Unable to open file: name = '01.dat', errno = 17, error message = 'file exists', flags = 15, o_flags = 502)

适合帮助

顺便说一下，下面的内部数据结构有元数据，结果和时间序列，在时间序列部分它有30个不同的组。

Answer 1

由于您希望将其放在pandas数据框中，只需使用pandas.read_hdf。

http://pandas.pydata.org/pandas-docs/version/0.17.0/generated/pandas.read_hdf.html