How do I traverse a hdf5 file using h5py

问题

How do I traverse all the groups and datasets of an hdf5 file using h5py?

I want to retrieve all the contents of the file from a common root using a for loop or something similar.

回答1:

visit() and visititems() are your friends here. Cf. http://docs.h5py.org/en/latest/high/group.html#Group.visit. Note that an h5py.File is also an h5py.Group. Example (not tested):

def visitor_func(name, node):
    if isinstance(node, h5py.Dataset):
         # node is a dataset
    else:
         # node is a group

with h5py.File('myfile.h5', 'r') as f:
    f.visititems(visitor_func)

回答2:

Well this is kind of an old thread but I thought I'd contribute anyway. This is what I did in a similar situation. For a data structure set up like this:

[group1]
    [group2]
        dataset1
        dataset2
    [group3]
        dataset3
        dataset4

I used:

datalist = []
def returnname(name):
    if 'dataset' in name and name not in datalist:
        return name
    else:
        return None
looper = 1
while looper == 1:
    name = f[group1].visit(returnname)
    if name == None:
        looper = 0
        continue
    datalist.append(name)

I haven't found an h5py equivalent for os.walk.

来源：https://stackoverflow.com/questions/31146036/how-do-i-traverse-a-hdf5-file-using-h5py