Fixing doctest failures due to changes in the plural ring implementation.

Author: tscrim

src/sage/algebras/lie_algebras/lie_algebra_element.pyx

@@ -156,20 +156,21 @@ cdef class LieAlgebraElement(IndexedFreeModuleElement):
             PBW[-1] + PBW[0] - 3*PBW[1]
         """
         UEA = self._parent.universal_enveloping_algebra()
-        try:
-            gen_dict = UEA.algebra_generators()
-        except (TypeError, AttributeError):
-            gen_dict = UEA.gens_dict()
         s = UEA.zero()
         if not self:
             return s
         # Special hook for when the index set of the parent of ``self``
         #   does not match the generators index set of the UEA.
         if hasattr(self._parent, '_UEA_names_map'):
             names_map = self._parent._UEA_names_map
+            gen_dict = UEA.gens_dict()
             for t, c in self._monomial_coefficients.items():
                 s += c * gen_dict[names_map[t]]
         else:
+            try:
+                gen_dict = UEA.algebra_generators()
+            except (TypeError, AttributeError):
+                gen_dict = UEA.gens_dict()
             for t, c in self._monomial_coefficients.items():
                 s += c * gen_dict[t]
         return s

src/sage/categories/finite_dimensional_lie_algebras_with_basis.py

@@ -7,7 +7,7 @@
 """
 
 # ****************************************************************************
-#       Copyright (C) 2013-2017 Travis Scrimshaw <tcscrims at gmail.com>
+#       Copyright (C) 2013-2024 Travis Scrimshaw <tcscrims at gmail.com>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by

src/sage/categories/lie_algebras_with_basis.py

@@ -7,13 +7,13 @@
 """
 
 #*****************************************************************************
-#       Copyright (C) 2013-2017 Travis Scrimshaw <tcscrims at gmail.com>
+#       Copyright (C) 2013-2024 Travis Scrimshaw <tcscrims at gmail.com>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 2 of the License, or
 # (at your option) any later version.
-#                  http://www.gnu.org/licenses/
+#                  https://www.gnu.org/licenses/
 #*****************************************************************************
 
 from sage.misc.abstract_method import abstract_method
@@ -239,20 +239,21 @@ def lift(self):
             """
             P = self.parent()
             UEA = P.universal_enveloping_algebra()
-            try:
-                gen_dict = UEA.algebra_generators()
-            except (TypeError, AttributeError):
-                gen_dict = UEA.gens_dict()
             s = UEA.zero()
             if not self:
                 return s
             # Special hook for when the index set of the parent of ``self``
             #   does not match the generators index set of the UEA.
             if hasattr(P, '_UEA_names_map'):
                 names_map = P._UEA_names_map
+                gen_dict = UEA.gens_dict()
                 for t, c in self.monomial_coefficients(copy=False).items():
                     s += c * gen_dict[names_map[t]]
             else:
+                try:
+                    gen_dict = UEA.algebra_generators()
+                except (TypeError, AttributeError):
+                    gen_dict = UEA.gens_dict()
                 for t, c in self.monomial_coefficients(copy=False).items():
                     s += c * gen_dict[t]
             return s

src/sage/rings/polynomial/plural.pyx

@@ -863,12 +863,12 @@ cdef class NCPolynomialRing_plural(Ring):
         EXAMPLES::
 
             sage: A.<x,y,z> = FreeAlgebra(QQ, 3)
-            sage: P = A.g_algebra(relations={y*x:-x*y}, order = 'lex')
+            sage: P = A.g_algebra(relations={y*x:-x*y}, order='lex')
             sage: P.algebra_generators()
-            Family (x, y, z)
+            Finite family {'x': x, 'y': y, 'z': z}
         """
         from sage.sets.family import Family
-        return Family(self.gens())
+        return Family(self.gens_dict())
 
     def ideal(self, *gens, **kwds):
         """