title: Combining hdf5 files
body: <p>I have a number of hdf5 files, each of which have a single dataset. The datasets are too large to hold in RAM. I would like to combine these files into a single file containing all datasets separately (i.e. <strong>not</strong> to concatenate the datasets into a single dataset).</p>
  
  <p>One way to do this is to create a hdf5 file and then copy the datasets one by one. This will be slow and complicated because it will need to be buffered copy.</p>
  
  <p>Is there a more simple way to do this? Seems like there should be, since it is essentially just creating a container file.</p>
  
  <p>I am using python/h5py.</p>