debug identity

src/dfba_sampling/metamodel.py

@@ -629,7 +629,7 @@ class Metamodel(object):
                 and "identity" in self.metamodel_yml[self.bact]
                 and self.compound_name[i] in self.metamodel_yml[self.bact]["identity"]
             ):
-                res.append((np.zeros((Nv, Nobs)), 0, None))
+                res.append((np.zeros((Nv, Nobs)), 0, [0]))
             else:
                 res.append(
                     solve_groupLASSO(