HDF5Frame¶
- class baseband_tasks.io.hdf5.HDF5Frame(header, payload, valid=None, verify=True)[source] [edit on github]¶
Bases:
baseband.base.frame.FrameBase
Representation of a HDF5 frame, consisting of a header and payload.
- Parameters
- header
HDF5Header
Wrapper around the yaml-encoded header information.
- payload
HDF5Payload
Wrapper around the payload, provding mechanisms to decode it.
- validbool or None
Whether the data are valid.
- verifybool
Whether to do basic verification of integrity (default:
True
)
- header
Notes
The Frame can also be read instantiated using class methods:
fromfile : read header and payload from a filehandle
fromdata : encode data as payload
Of course, one can also do the opposite:
tofile : method to write header and payload to filehandle
data : property that yields full decoded payload
A number of properties are defined:
shape
,dtype
andsize
are the shape, type and number of complete samples of the data array, andnbytes
the frame size in bytes. Furthermore, the frame acts as a dictionary, with keys those of the header. Any attribute that is not defined on the frame itself, such as.time
will be looked up on the header as well.Attributes Summary
Full decoded frame.
Numeric type of the frame data.
Value to replace invalid data in the frame.
Size of the encoded frame in bytes.
Number of dimensions of the frame data.
Shape of a sample in the frame (nchan,).
Shape of the frame data.
Total number of component samples in the frame data.
Whether frame contains valid data.
Methods Summary
fromdata
(data[, header])Construct frame from data and header.
fromfile
(fh[, valid, verify])Read a frame from a filehandle.
keys
()tofile
(fh)Write encoded frame to filehandle.
verify
()Simple verification.
Attributes Documentation
- data¶
Full decoded frame.
- dtype¶
Numeric type of the frame data.
- fill_value¶
Value to replace invalid data in the frame.
- nbytes¶
Size of the encoded frame in bytes.
- ndim¶
Number of dimensions of the frame data.
- sample_shape¶
Shape of a sample in the frame (nchan,).
- shape¶
Shape of the frame data.
- size¶
Total number of component samples in the frame data.
- valid¶
Whether frame contains valid data.
Methods Documentation
- classmethod fromdata(data, header=None)[source] [edit on github]¶
Construct frame from data and header.
- Parameters
- data
ndarray
Array holding data to be encoded.
- headerheader instance, optional
Header for the frame.
- validbool, optional
Whether the data are valid. Default: inferred from header if possible, otherwise
True
.- verifybool, optional
Whether to verify the header and frame correctness.
- **kwargs
Used to initialize the header, if not given.
- data
- classmethod fromfile(fh, valid=True, verify=True)[source] [edit on github]¶
Read a frame from a filehandle.
- keys() [edit on github]¶
- tofile(fh)[source] [edit on github]¶
Write encoded frame to filehandle.
- verify() [edit on github]¶
Simple verification. To be added to by subclasses.