Low-Level API
This documentation mostly describes the h5py high-level API, which offers the main features of HDF5 in an interface modelled on dictionaries and NumPy arrays. h5py also provides a low-level API, which more closely follows the HDF5 C API.
You can easily switch between the two levels in your code:
To the low-level: High-level
File
,Group
andDataset
objects all have a.id
attribute exposing the corresponding low-level objects—FileID
,GroupID
andDatasetID
:dsid = dset.id dsid.get_offset() # Low-level method
Although there is no high-level object for a single attribute,
AttributeManager.get_id()
will get the low-levelAttrID
object:aid = dset.attrs.get_id('timestamp') aid.get_storage_size() # Low-level method
To the high-level: Low-level
FileID
,GroupID
andDatasetID
objects can be passed to the constructors ofFile
,Group
andDataset
, respectively.