Merge pull request #206 from s-goldman/hla-1312_numpy2_scalar_promoti…

…on_08_29_24 HLA-1312: Numpy 2.0 scalar promotion issues in STWCS
spacetelescope · Sep 18, 2024 · 9b8269b · 9b8269b
2 parents 5a9212e + 6f4561e
commit 9b8269b
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -1,6 +1,9 @@
 1.7.3 (Unreleased)
 ------------------
 
+- Manual scalar promotion of refpix['PSCALE'] from float32
+  to float64 to avoid future Numpy 2.0 issues [#206].
+
 - Pin astropy min version to 5.0.4. [#191]
 
 1.7.2 (2021-11-29)

diff --git a/stwcs/distortion/mutil.py b/stwcs/distortion/mutil.py
@@ -202,7 +202,7 @@ def readIDCtab(tabname, chip=1, date=None, direction='forward',
     refpix['YREF'] = ftab[1].data.field('YREF')[row]
     refpix['XSIZE'] = ftab[1].data.field('XSIZE')[row]
     refpix['YSIZE'] = ftab[1].data.field('YSIZE')[row]
-    refpix['PSCALE'] = round(ftab[1].data.field('SCALE')[row], 8)
+    refpix['PSCALE'] = round(float(ftab[1].data.field('SCALE')[row]), 8)
     refpix['V2REF'] = v2ref
     refpix['V3REF'] = v3ref
     refpix['THETA'] = theta