Problem reading segments from HDF5 group

Created by: areeda

I'm working on a single HDF5 file with segments and triggers in a single file. When reading he segetts wih

    infile = '/data/t/testtrig1.h5'
    inf = h5py.File(infile, 'r')
    segpth - '/segments/L1:Manual:1'
    seg = DataQualityFlag.read(inf, path=segpth, verbose=True, format='hdf5')

Produces error (Python 3):

Traceback (most recent call last):
  File "/Users/areeda/ligo/python/Learn/hdf5/bin/sgFind.py", line 72, in <module>
    seg = DataQualityFlag.read(inf, path=segpth, verbose=True, format='hdf5')
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/segments/flag.py", line 635, in read
    return io_read_multi(combiner, cls, source, *args, **kwargs)
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/io/mp.py", line 96, in read_multi
    nproc, _read_single_file, files, verbose=verbose, unit='files')
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/utils/mp.py", line 132, in multiprocess_with_queues
    return list(map(_inner, inputs))
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/utils/mp.py", line 119, in _inner
    return func(x)
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/io/mp.py", line 81, in _read_single_file
    return fobj, io_read(cls, fobj, *args, **kwargs)
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/astropy/io/registry.py", line 517, in read
    data = reader(*args, **kwargs)
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/io/hdf5.py", line 60, in decorated_func
    return func(fobj, *args, **kwargs)
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/segments/io/hdf5.py", line 151, in read_hdf5_flag
    return DataQualityFlag(active=active, known=known, **dict(dataset.attrs))
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/segments/flag.py", line 149, in __init__
    self.name = name
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/segments/flag.py", line 175, in name
    self._parse_name(name)
  File "/Users/areeda/miniconda2/envs/ligo-py36/lib/python3.6/site-packages/gwpy/segments/flag.py", line 943, in _parse_name
    elif re_IFO_TAG_VERSION.match(name):
TypeError: cannot use a string pattern on a bytes-like object

I seems like gwpy/segments/flag.py line 943

        elif re_IFO_TAG_VERSION.match(name):

is being passed a name=b'L1:Manual:1' rater than a str