我无法使用h5py读取数据。 “无法创建组”

Question

我试图完成快速入门页面上的小例子

http://www.h5py.org/docs/intro/quick.html

import h5py 
f = h5py.File('myfile.hdf5','w') 
dset = f.create_dataset("MyDataset", (100, 100), 'i') 
dset[...] = 42 
f.close() 

ff = h5py.File('myfile.hdf5','r') 
dset = ff.create_group("MyDataset") 

输出

Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/lib/python2.7/dist-packages/h5py/_hl/group.py", line 28, in create_group 
    gid = h5g.create(self.id, name, lcpl=lcpl) 
    File "h5g.pyx", line 135, in h5py.h5g.create (h5py/h5g.c:2057) 
ValueError: unable to create group (Symbol table: Unable to initialize object) 

我是否想要正确地做到这一点？

Answer 1

使用'a'模式追加到该文件，不命名该组的名称相同的数据集：

import h5py 
with h5py.File('myfile.hdf5','w') as f: 
    dset = f.create_dataset("MyDataset", (100, 100), 'i') 
    dset[...] = 42 

with h5py.File('myfile.hdf5','r+') as ff: 
    dset = ff.create_group("MyGroup")