add_datasum(self, when=None, datasum_keyword='DATASUM')
For testing purposes, provide a when
argument to enable the comment value in the card to remain consistent. This will enable the generation of a CHECKSUM
card with a consistent value.
Comment string for the card that by default represents the time when the checksum was calculated
The name of the header keyword to store the datasum value in; this is typically 'DATASUM' per convention, but there exist use cases in which a different keyword should be used
The calculated datasum
Add the DATASUM
card to this HDU with the value set to the checksum calculated for the data.
The following pages refer to to this document either explicitly or contain code examples using this.
astropy.io.fits.hdu.base._ValidHDU.add_checksum
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them