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@mkoeppe mkoeppe commented Apr 16, 2023

📚 Description

Rebased ancient patches:

📝 Checklist

  • The title is concise, informative, and self-explanatory.
  • The description explains in detail what this PR is about.
  • I have linked a relevant issue or discussion.
  • I have created tests covering the changes.
  • I have updated the documentation accordingly.

⌛ Dependencies

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Documentation preview for this PR is ready! 🎉
Built with commit: 4484e49

vbraun pushed a commit to vbraun/sage that referenced this pull request Jun 16, 2024
sagemathgh-38096: `sage.combinat`, `sage.games`: Use more `lazy_import` in all.py files
    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes sagemath#12345". -->

This helps with the modularization, but is also desirable for reducing
the start-up time of Sage.
- Cherry-picked from sagemath#37900

Related: sagemath#35520

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->

- [x] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on. For example,
-->
<!-- - sagemath#12345: short description why this is a dependency -->
<!-- - sagemath#34567: ... -->
    
URL: sagemath#38096
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee
vbraun pushed a commit to vbraun/sage that referenced this pull request Jun 16, 2024
sagemathgh-38096: `sage.combinat`, `sage.games`: Use more `lazy_import` in all.py files
    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes sagemath#12345". -->

This helps with the modularization, but is also desirable for reducing
the start-up time of Sage.
- Cherry-picked from sagemath#37900

Related: sagemath#35520

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->

- [x] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on. For example,
-->
<!-- - sagemath#12345: short description why this is a dependency -->
<!-- - sagemath#34567: ... -->
    
URL: sagemath#38096
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee
vbraun pushed a commit to vbraun/sage that referenced this pull request Jun 17, 2024
sagemathgh-38096: `sage.combinat`, `sage.games`: Use more `lazy_import` in all.py files
    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes sagemath#12345". -->

This helps with the modularization, but is also desirable for reducing
the start-up time of Sage.
- Cherry-picked from sagemath#37900

Related: sagemath#35520

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->

- [x] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on. For example,
-->
<!-- - sagemath#12345: short description why this is a dependency -->
<!-- - sagemath#34567: ... -->
    
URL: sagemath#38096
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee
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Lazy import root systems, crystals and other combinatorics features to save on startup time. Lazy imports for WeylGroup and other MatrixGroups
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