Remove useless 'from . import all' from some __init__.py files

[mkoeppe]

... and similar imports of modules in the package, found via

find src/sage -name '__init__.py' | xargs grep import

Possibly some of them are needed to break circular imports, but likely not all of them.

Part of #32501.

Depends on #32506

CC: @tscrim @fchapoton

Component: refactoring

Author: Matthias Koeppe

Branch/Commit: 55ca4bc

Reviewer: Frédéric Chapoton

Issue created by migration from https://trac.sagemath.org/ticket/32507

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,3 +1,5 @@
+... and similar imports of modules in the package.
+
 Possibly some of them are needed to break circular imports, but likely not all of them.
 
 Part of #32501.

[mkoeppe]

Branch: u/mkoeppe/remove_useless__from___import_all__from_some___init___py_files

[mkoeppe]

Commit: 8efece0

[mkoeppe]

comment:3

In src/sage/combinat/__init__.py, there is

from . import quickref
from . import tutorial

These are modules without code. Are these imports needed for anything?

---

New commits:

8efece0

sage.graphs, sage.graphs.graph_decompositions: Remove unnecessary import of modules

[mkoeppe]

comment:4

from . import all was previously discussed in #20617 comment:16

[mkoeppe]

Author: Matthias Koeppe

[sagetrac-git]

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

892f2e7

Remove all 'from . import all' from __init__.py files

[sagetrac-git]

Changed commit from 8efece0 to 892f2e7

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,4 +1,8 @@
-... and similar imports of modules in the package.
+... and similar imports of modules in the package, found via
+
+```
+find src/sage -name '__init__.py' | xargs grep import
+```
 
 Possibly some of them are needed to break circular imports, but likely not all of them.
 

[mkoeppe]

comment:8

Replying to @mkoeppe:

In src/sage/combinat/__init__.py, there is

from . import quickref
from . import tutorial

These are modules without code. Are these imports needed for anything?

Also:

src/sage/categories/__init__.py:from . import primer

[mkoeppe]

comment:9

I am guessing these are some kind of workarounds for the sphinx docbuild?
We can take care of them in #32508.

[fchapoton]

comment:10

looks good, but does it pass the doctests with optional - dot2tex ?

[mkoeppe]

comment:11

Just tested, yes it does

[fchapoton]

comment:12

ok, thx. Then let's go

[fchapoton]

Reviewer: Frédéric Chapoton