astropy 5.0

_hdu_class_from_header(cls, header)

It's important to be aware that the class hierarchy is traversed in a depth-last order. Each match_header() should identify an HDU type as uniquely as possible. Abstract types may choose to simply return False or raise NotImplementedError to be skipped.

If any unexpected exceptions are raised while evaluating match_header(), the type is taken to be _CorruptedHDU.

Used primarily by _BaseHDU._readfrom_internal and _BaseHDU._from_data to find an appropriate HDU class to use based on values in the header.

Iterates through the subclasses of _BaseHDU and uses that class's match_header() method to determine which subclass to instantiate.

Examples

See :

Local connectivity graph

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


File: /astropy/io/fits/hdu/base.py#65
type: <class 'function'>
Commit: