fix(core): catch missing reduced costs and shadow prices. (#1383)

* fix(core): catch missing reduced costs and shadow prices. Fixes #1381 and #1372 * Added fix to next release
opencobra · Apr 8, 2024 · 0eb90d4 · 0eb90d4
1 parent d6632a4
commit 0eb90d4
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diff --git a/release-notes/next-release.md b/release-notes/next-release.md
@@ -5,6 +5,7 @@
 ## Fixes
 
 * Fixes the incorrect bounds in the CycleFree loop removal.
+* Fixes reduced costs and shadow prices not available when using non-convex models.
 
 ## Other
 

diff --git a/src/cobra/core/solution.py b/src/cobra/core/solution.py
@@ -174,7 +174,15 @@ def get_solution(
     reduced = np.empty(len(reactions))
     var_primals = model.solver.primal_values
     shadow = np.empty(len(metabolites))
-    if model.solver.is_integer:
+
+    try:
+        var_duals = model.solver.reduced_costs
+        constr_duals = model.solver.shadow_prices
+        duals_available = True
+    except Exception:
+        duals_available = False
+
+    if model.solver.is_integer or not duals_available:
         reduced.fill(np.nan)
         shadow.fill(np.nan)
         for i, rxn in enumerate(reactions):