Update GPRL/utils/gp_utils.py

GPRL/utils/gp_utils.py

@@ -67,7 +67,7 @@ def mutate(individual, expr=None, pset=None, mode="one", mu=0, std=1):#mutate th
         return gp.mutUniform(individual, expr=expr, pset=pset)
 
 def selQDRandom(grid, k, cellSelection=random.choice):
-    idxs = [k for k, v in grid._solutions.items() if v]
+    idxs = [key for key, v in grid._solutions.items() if v]
     return [cellSelection(grid._solutions[random.choice(idxs)]) for _ in range(k)]
 
 def selFitProp(individuals, fit_attr="fitness"):#cell fitness proportionnal selection