py3: polyhedron folder with optional packages

[jplab]

There are 7 failing doctests in base.py using optional packages (latte_int and lrslib):

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sage -t src/sage/geometry/polyhedron/base.py  # 7 doctests failed
sage -t src/sage/geometry/polyhedron/base_ZZ.py  # 1 doctest failed
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This tickets fixes them. The remaining packages are 'polymake' and 'polytopes_db_4d', which are experimental or not yet known status (see #26029).

CC: @jplab @mkoeppe @videlec @fchapoton

Component: python3

Keywords: polyhedron, days100

Author: Jean-Philippe Labbé

Branch/Commit: 846069d

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/28235

[jplab]

Branch: public/28235

[jplab]

New commits:

d3dc7aa

fix py3 in base.py with optional packages

[jplab]

Description changed:

--- 
+++ 
@@ -7,6 +7,6 @@
 ----------------------------------------------------------------------
 ```
 
-This tickets fixes them. The remaining optional packages are 'polymake' and 'polytopes_db_4d'
+This tickets fixes them. The remaining packages are 'polymake' and 'polytopes_db_4d', which are experimental or not yet known status (see #26029).
 
 

[jplab]

Commit: d3dc7aa

[jplab]

Description changed:

--- 
+++ 
@@ -1,4 +1,4 @@
-There are 7 failing doctests in base.py:
+There are 7 failing doctests in base.py using optional packages (`latte_int` and `lrslib`):
 
 ```
 ----------------------------------------------------------------------

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

c69d74f

moved the import statement

[sagetrac-git]

Changed commit from d3dc7aa to c69d74f

[jplab]

comment:4

... received the green light from chapoton.