py3: cleanup of toy d basis

[fchapoton]

plus full pep cleanup

CC: @tscrim

Component: python3

Author: Frédéric Chapoton

Branch/Commit: 05b18cd

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/26670

[fchapoton]

New commits:

05b18cd

py3: cleanup of toy_d_basis (plus pep corrections)

[fchapoton]

Branch: u/chapoton/26670

[fchapoton]

Commit: 05b18cd

[fchapoton]

comment:2

bot is morally green.

There is one potentially controversial change,

     sage: gb = d_basis(I); gb
-    [z - 107196348594952664476180297953816049406949517534824683390654620424703403993052759002989622,
-    y + 84382748470495086324437828161121754084154498572003307352857967748090984550697850484197972764799434672877850291328840,
-    x + 105754645239745824529618668609551113725317621921665293762587811716173,
-    282687803443]
+    [z ..., y ..., x ..., 282687803443]

where the important part of the result is the last integer. The 3 previous linear polynomials are only unique modulo this integer, and random otherwise.

[tscrim]

Reviewer: Travis Scrimshaw

[tscrim]

comment:4

I think this change is fine. It shows a little bit more of what is important for that test and makes the test look cleaner.

[vbraun]

Changed branch from u/chapoton/26670 to 05b18cd