sage.structure, sage.misc: Replace import of sage.categories.all by more specific imports

[mkoeppe]

sage.structure should only depend on basic categories such as sage.categories.morphism, sage.categories.pushout to support the parent/element framework and coercion, but not on more specialized ones such as sage.categories.modular_abelian_varieties.

This is for #29865 (sage-objects), which should pull in only a small part of sage.categories -- less than what sage.categories.basic imports.

CC: @tscrim @nthiery

Component: categories

Author: Matthias Koeppe

Branch/Commit: ce8fa70

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/29916

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,3 +1,3 @@
 `sage.structure` should only depend on basic categories such as `sage.categories.morphism`, `sage.categories.pushout` to support the parent/element framework and coercion, but not on more specialized ones such as `sage.categories.modular_abelian_varieties`.
 
-This is for #29865.
+This is for #29865 (`sage-objects`), which should pull in only a small part of `sage.categories` -- less than what `sage.categories.basic` imports.

[mkoeppe]

Branch: u/mkoeppe/sage_structure__sage_misc__replace_import_of_sage_categories_all_by_more_specific_imports

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

ce8fa70

sage.structure, sage.misc: Replace import of sage.categories.all by more specific imports

[mkoeppe]

Commit: ce8fa70

[mkoeppe]

comment:5

Patchbot is green, needs review

[tscrim]

comment:6

LGTM.

[tscrim]

Reviewer: Travis Scrimshaw

[mkoeppe]

comment:7

Thanks!

[vbraun]

Changed branch from u/mkoeppe/sage_structure__sage_misc__replace_import_of_sage_categories_all_by_more_specific_imports to ce8fa70