Get rid of more SageMath DeprecationWarnings

python/exterior_to_link/barycentric_geometry.py

@@ -5,7 +5,7 @@
 """
 
 from ..snap.t3mlite.simplex import *
-from .rational_linear_algebra import Matrix, Vector3, Vector4
+from .rational_linear_algebra import Matrix, Vector3, Vector4, rational_round
 from . import pl_utils
 
 
@@ -185,7 +185,7 @@ def round(self, max_denom=2**32, force=False):
             v = []
             for y in max_denom * self.vector:
                 if y != 0:
-                    y = max(y.round(), 1)
+                    y = max(rational_round(y), 1)
                 v.append(y)
 
             # Should be just Vector4(v)/sum(v)

python/exterior_to_link/rational_linear_algebra.py

@@ -19,6 +19,10 @@
 if sage_helper._within_sage and not use_pari_even_inside_sage:
     from ..sage_helper import QQ, RR, vector, matrix, VectorSpace
 
+    def rational_round(x):
+        # This is just to suppress a deprecation warning.
+        return x.round(mode='even')
+
     def rational_sqrt(x):
         """
         Given a nonnegative rational x, return a rational r which is close to
@@ -58,6 +62,9 @@ def Matrix(entries):
     from ..snap.t3mlite import linalg
     QQ = linalg.pari
 
+    def rational_round(x):
+        return x.round()
+
     def rational_sqrt(x):
         """
         Given a nonnegative rational x, return a rational r which is close to

python/sage_helper.py

@@ -81,7 +81,7 @@ def sage_method(function):
         from sage.rings.real_mpfr import RealField, RealNumber, RR
 
     from sage.rings.complex_interval_field import ComplexIntervalField
-    from sage.rings.real_mpfi import is_RealIntervalFieldElement, RealIntervalField
+    from sage.rings.real_mpfi import RealIntervalFieldElement, RealIntervalField
     from sage.rings.real_mpfr import RealNumber, RealField_class
     from sage.structure.sage_object import SageObject
 

python/verify/upper_halfspace/finite_point.py

@@ -2,7 +2,7 @@
 
 if _within_sage:
     import sage
-    from ...sage_helper import matrix, sqrt, is_RealIntervalFieldElement, Infinity
+    from ...sage_helper import matrix, sqrt, RealIntervalFieldElement, Infinity
 
 from .extended_matrix import ExtendedMatrix
 
@@ -167,7 +167,7 @@ def cosh_dist(self, other):
         #
         RIF = r.parent()
         if _within_sage:
-            if is_RealIntervalFieldElement(r):
+            if isinstance(r, RealIntervalFieldElement):
                 return r.intersection(RIF(1, Infinity))
         if r < 1.0:
             return RIF(1.0)