def read_time_h5(h5folder):
with h5py.File(h5folder / '<STR_LIT>', '<STR_LIT:r>') as h5f:<EOL><INDENT>for name, dset in h5f.items():<EOL><INDENT>yield int(name[-<NUM_LIT:5>:]), int(dset[<NUM_LIT:2>])<EOL><DEDENT><DEDENT>
Iterate through (isnap, istep) recorded in h5folder/'time_botT.h5'.

    Args:
        h5folder (:class:`pathlib.Path`): directory of HDF5 output files.
    Yields:
        tuple of int: (isnap, istep).