cast to float to fix agg

Author: Jammy2211

autolens/lens/tracer.py

@@ -50,6 +50,9 @@ def __init__(
             The cosmology used to perform ray-tracing calculations.
         """
 
+        # if isinstance(galaxies, af.ModelInstance):
+        #     galaxies = list(galaxies.values())
+
         self.galaxies = galaxies
 
         self.cosmology = cosmology or ag.cosmo.Planck15()

autolens/lens/tracer_util.py

@@ -32,7 +32,8 @@ def plane_redshifts_from(galaxies: List[ag.Galaxy]) -> List[float]:
 
     galaxies_ascending_redshift = sorted(galaxies, key=lambda galaxy: galaxy.redshift)
 
-    plane_redshifts = [galaxy.redshift for galaxy in galaxies_ascending_redshift]
+    # Coerce to float to avoid issues with other float types not being hashable.
+    plane_redshifts = [float(galaxy.redshift) for galaxy in galaxies_ascending_redshift]
 
     return list(dict.fromkeys(plane_redshifts))