src/sage/rings/polynomial/polynomial_element_generic.py: Use try...ex…

…cept for an unpickle_override import
sagemath · Jan 27, 2023 · e46b5d5 · e46b5d5
1 parent a4f7955
commit e46b5d5
Showing 1 changed file with 8 additions and 6 deletions.
diff --git a/src/sage/rings/polynomial/polynomial_element_generic.py b/src/sage/rings/polynomial/polynomial_element_generic.py
@@ -1589,9 +1589,11 @@ class Polynomial_generic_sparse_cdvf(Polynomial_generic_sparse_cdv, Polynomial_g
 # XXX:  Ensures that the generic polynomials implemented in Sage via PARI  #
 # until at least until 4.5.0 unpickle correctly as polynomials implemented #
 # via FLINT.                                                               #
-from sage.misc.persist import register_unpickle_override
-from sage.rings.polynomial.polynomial_rational_flint import Polynomial_rational_flint
-
-register_unpickle_override( \
-    'sage.rings.polynomial.polynomial_element_generic', \
-    'Polynomial_rational_dense', Polynomial_rational_flint)
+try:
+    from sage.rings.polynomial.polynomial_rational_flint import Polynomial_rational_flint
+except ImportError:
+    pass
+else:
+    from sage.misc.persist import register_unpickle_override
+    register_unpickle_override('sage.rings.polynomial.polynomial_element_generic',
+                               'Polynomial_rational_dense', Polynomial_rational_flint)