see_myfile.py

import h5py
ispace = ' ' * 2

def see_dataset(dset, indent=0):
    sp = ispace * (indent+1)
    vstr = str(dset.value)
    print "\n".join([sp + vi for vi in vstr.split('\n')])

def see_group(group, indent=0):
    sp = ispace * indent
    for (name, value) in group.iteritems():
        if isinstance(value,h5py.Dataset):
            print sp + name + ":"
            see_dataset(value, indent+1)
        elif isinstance(value,h5py.Group):
            print sp + name + ":"
            see_group(value, indent+1)

def see_hdf5(path):
    f = h5py.File(path)
    see_group(f)
    return f

see_hdf5('myfile.hdf5').close()