sage_input for infinities and RealSet

[mkoeppe]

sage: sage_input(RealSet((0, 1)))
ValueError: Can't convert (0, 1) to sage_input form

This ticket implements sage_input for RealSets (and, as a prerequisite for that, for infinities).

CC: @rwst @vbraun @videlec

Component: numerical

Author: Matthias Koeppe

Branch/Commit: 67f8fa1

Reviewer: Volker Braun

Issue created by migration from https://trac.sagemath.org/ticket/21277

[mkoeppe]

Branch: u/mkoeppe/sage_input_for_realset_and_piecewise

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

Description changed:

--- 
+++ 
@@ -4,3 +4,5 @@
 ValueError: Can't convert (0, 1) to sage_input form
 ```
 
+This ticket implements `sage_input` for `RealSet`s (and, as a prerequisite for that, for infinities).
+

[mkoeppe]

New commits:

1543f32	sage_input for infinities
67f8fa1	sage_input for RealSet

[mkoeppe]

Commit: 67f8fa1

[vbraun]

Reviewer: Volker Braun

[mkoeppe]

comment:5

Thanks!

[vbraun]

Changed branch from u/mkoeppe/sage_input_for_realset_and_piecewise to 67f8fa1