如何使用 Python 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。现在我需要了解如何将内部数据检索为 table 以查看这些数据。我尝试使用 h5py 读取文件并将其放入 pandas 数据帧，但不幸的是有一些错误，有人可以为我提供一些示例来解决这个问题吗？

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，好像无法读取 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

既然你想把它放在pandas数据框里，就用pandas.read_hdf.

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

如何使用 Python 检索 HDF5 文件

How to use Python to retrieve HDF5 files

python

hdf5

python-2.7

pandas