From: Michael Orlitzky <michael@orlitzky.com>
Date: Sat, 7 Dec 2019 23:09:48 +0000 (-0500)
Subject: eja: use zip() instead of izip(), which doesn't exist in python-3.x.
X-Git-Url: http://gitweb.michael.orlitzky.com/?a=commitdiff_plain;h=c4203897950b84665ea41ed103f87f68aee0852e;p=sage.d.git

eja: use zip() instead of izip(), which doesn't exist in python-3.x.
---

diff --git a/mjo/eja/eja_algebra.py b/mjo/eja/eja_algebra.py
index 71cdd6f..0f2b655 100644
--- a/mjo/eja/eja_algebra.py
+++ b/mjo/eja/eja_algebra.py
@@ -5,7 +5,7 @@ are used in optimization, and have some additional nice methods beyond
 what can be supported in a general Jordan Algebra.
 """
 
-from itertools import izip, repeat
+from itertools import repeat
 
 from sage.algebras.quatalg.quaternion_algebra import QuaternionAlgebra
 from sage.categories.magmatic_algebras import MagmaticAlgebras
@@ -1032,7 +1032,7 @@ class MatrixEuclideanJordanAlgebra(FiniteDimensionalEuclideanJordanAlgebra):
                 basis = tuple( s.change_ring(field) for s in basis )
             self._basis_normalizers = tuple(
                 ~(self.natural_inner_product(s,s).sqrt()) for s in basis )
-            basis = tuple(s*c for (s,c) in izip(basis,self._basis_normalizers))
+            basis = tuple(s*c for (s,c) in zip(basis,self._basis_normalizers))
 
         Qs = self.multiplication_table_from_matrix_basis(basis)
 
@@ -1055,8 +1055,8 @@ class MatrixEuclideanJordanAlgebra(FiniteDimensionalEuclideanJordanAlgebra):
             # with had entries in a nice field.
             return super(MatrixEuclideanJordanAlgebra, self)._charpoly_coeff(i)
         else:
-            basis = ( (b/n) for (b,n) in izip(self.natural_basis(),
-                                              self._basis_normalizers) )
+            basis = ( (b/n) for (b,n) in zip(self.natural_basis(),
+                                             self._basis_normalizers) )
 
             # Do this over the rationals and convert back at the end.
             J = MatrixEuclideanJordanAlgebra(QQ,
@@ -1066,7 +1066,7 @@ class MatrixEuclideanJordanAlgebra(FiniteDimensionalEuclideanJordanAlgebra):
             (_,x,_,_) = J._charpoly_matrix_system()
             p = J._charpoly_coeff(i)
             # p might be missing some vars, have to substitute "optionally"
-            pairs = izip(x.base_ring().gens(), self._basis_normalizers)
+            pairs = zip(x.base_ring().gens(), self._basis_normalizers)
             substitutions = { v: v*c for (v,c) in pairs }
             result = p.subs(substitutions)
 
diff --git a/mjo/eja/eja_element.py b/mjo/eja/eja_element.py
index 276eab0..b7061bf 100644
--- a/mjo/eja/eja_element.py
+++ b/mjo/eja/eja_element.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
 
-from itertools import izip
-
 from sage.matrix.constructor import matrix
 from sage.modules.free_module import VectorSpace
 from sage.modules.with_basis.indexed_element import IndexedFreeModuleElement
@@ -988,7 +986,7 @@ class FiniteDimensionalEuclideanJordanAlgebraElement(IndexedFreeModuleElement):
         """
         B = self.parent().natural_basis()
         W = self.parent().natural_basis_space()
-        return W.linear_combination(izip(B,self.to_vector()))
+        return W.linear_combination(zip(B,self.to_vector()))
 
 
     def norm(self):