initial HDF5 file read/write support

Functions to save/load noise traces and IFO model parameters to/from HDF5
files.  Requires the h5py module.

gwinc/util.py

+import datetime
+import h5py
+
+from . import struct
+
+
+def load_hdf5(path):
+    """Load IFO and noises from HDF5 file.
+
+    Returns (name, ifo, noises) tuple load from file.
+
+    """
+    with h5py.File(path, 'r') as f:
+        name = f.attrs['name']
+        ifo = struct.Struct.from_yaml(f.attrs['IFO'])
+        noises = {}
+        for name, data in f['/traces'].items():
+            noises[name] = data.value
+        return name, ifo, noises
+
+
+def save_hdf5(name, ifo, noises, path):
+    """Save IFO and noises to HDF5 file.
+
+    """
+    with h5py.File(path, 'w') as f:
+        f.attrs['schema'] = 'GWINC noise budget'
+        # FIXME: add GWINC version
+        f.attrs['date'] = datetime.datetime.now().isoformat()
+        f.attrs['name'] = name
+        f.attrs['IFO'] = ifo.to_yaml()
+        tgrp = f.create_group('traces')
+        for noise, data in noises.items():
+            tgrp.create_dataset(noise, data=data)

setup.py

@@ -30,6 +30,7 @@ setup_args = dict(
     install_requires = [
         'numpy',
         'scipy',
+        'h5py',
         'matplotlib',
     ],