py3 again some care for range

[fchapoton]

part of #16081

CC: @jdemeyer @tscrim

Component: python3

Author: Frédéric Chapoton

Branch/Commit: be9e797

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/22816

[fchapoton]

New commits:

be9e797

some more care for range..

[fchapoton]

Branch: u/chapoton/22816

[fchapoton]

Commit: be9e797

[tscrim]

comment:2

The only change I am not sure about is this one:

diff --git a/src/sage/matrix/matrix0.pyx b/src/sage/matrix/matrix0.pyx
index c5959f0..50b5d00 100644
--- a/src/sage/matrix/matrix0.pyx
+++ b/src/sage/matrix/matrix0.pyx
@@ -5177,7 +5177,7 @@ cdef class Matrix(sage.structure.element.Matrix):
             if not B[self._nrows-1, self._ncols-1]:
                 raise ZeroDivisionError("input matrix must be nonsingular")
 
-        return B.matrix_from_columns(range(self._ncols, 2*self._ncols))
+        return B.matrix_from_columns(list(xrange(self._ncols, 2 * self._ncols)))
 
     def __pos__(self):
         """

I forget if Cython keeps the behavior that range will return a list in Python3. If it will, then I'm good with the change, otherwise, then I'd like to know if Cython optimizes this.

[tscrim]

comment:3

ping?

[fchapoton]

comment:4

I have no idea..

[fchapoton]

comment:5

There are already a few list(xrange(...)) in the very same file..

[tscrim]

comment:6

Fair point.

[tscrim]

Reviewer: Travis Scrimshaw

[vbraun]

Changed branch from u/chapoton/22816 to be9e797