FunctionTransform¶
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class
astropy.coordinates.
FunctionTransform
(func, fromsys, tosys, priority=1, register_graph=None)[source] [edit on github]¶ Bases:
astropy.coordinates.CoordinateTransform
A coordinate transformation defined by a function that accepts a coordinate object and returns the transformed coordinate object.
Parameters: func : callable
The transformation function. Should have a call signature
func(formcoord, toframe)
. Note that, unlikeCoordinateTransform.__call__
,toframe
is assumed to be of typetosys
for this function.fromsys : class
The coordinate frame class to start from.
tosys : class
The coordinate frame class to transform into.
priority : number
The priority if this transform when finding the shortest coordinate transform path - large numbers are lower priorities.
register_graph :
TransformGraph
orNone
A graph to register this transformation with on creation, or
None
to leave it unregistered.Raises: TypeError
If
func
is not callable.ValueError
If
func
cannot accept two arguments.Methods Summary
__call__
(fromcoord, toframe)Methods Documentation
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__call__
(fromcoord, toframe)[source] [edit on github]¶
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