[Fix] editable install in python>=3.13

[MGAMZ]

This is a sub-PR of #1665.

This PR fixes a compatibility issue in get_version() caused by relying on exec() to modify the local namespace.

The current implementation executes a version file with exec(...) and then attempts to retrieve __version__ from locals(). While this may appear to work in Python ≤3.12, it breaks in Python 3.13+ due to changes introduced by PEP 667, which standardizes execution context behavior and prevents exec() from mutating a function’s local scope.

To ensure correctness and forward compatibility, this PR explicitly passes a dedicated dictionary as the global namespace to exec(), and safely reads __version__ from that namespace.

Noted that setup.py is deprecated and we should include pyproject.toml according to the latest PyPA, and PEP 621.

[MGAMZ]

@HAOCHENYE This one ready to be reviewed.

[MGAMZ]

This PR fails at some pytest unit due to Network connecting issue or me not having multi-GPUs to test 😂, including:

tests/test_fileio/test_fileclient.py
tests/test_hooks/test_sync_buffers_hook.py
tests/test_model/test_model_utils.py::test_convert_syncbn
tests/test_strategies/test_fsdp.py

And tests/test_visualizer/test_vis_backend.py fails for not having a matched distribution of aimrocks

pytest runs on

1. python 3.13.9
2. torch 2.10.0.dev

[Copilot]

Pull Request Overview

This PR addresses a Python 3.13+ compatibility issue in the get_version() function caused by PEP 667 changes to how exec() interacts with local namespaces. The fix explicitly provides a dictionary as the global namespace to exec() and retrieves the version from that dictionary, ensuring the code works correctly across Python versions.

Key Changes:

• Modified get_version() to use an explicit dictionary for exec() namespace instead of relying on locals()
• Changed version retrieval from locals()['__version__'] to direct dictionary access

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[HAOCHENYE]

Leave this PR for review last. I'm considering replacing setuptools with hatch as mmengine's new build system.