Helper function for constructing URIs for `sqlite3.connect()`

Feature or enhancement

Proposal:

When working with SQLite3 URIs, one very subtle thing about them is if you are on Windows and the database path starts with a drive letter, you need to make sure there's a leading /. You must also use POSIX file path separators.

A non-optimized solution is:

db_path = path.resolve(strict=True).as_posix()
if not db_path.startswith("/"):
    # Starts with a Windows drive letter, so add leading slash.
    db_path = "/" + db_path

This seems subtle enough to potentially warrant a function to take a pathlib.Path object and construct the resulting file: URI appropriately. I'm sure something nicer that doesn't force the absolute path could be used to save on any extra stat calls (if people are even that concerned for a single call that opens a database).

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

先阅读 sqlite3.connect() 入口点以及提案中描述的 pathlib.Path 行为，然后查看 SQLite 的 URI 要求。完成的标准是就实现一个从 Path 构造适当 file: URI 的 helper 达成一致并完成实现，其中包括 Windows 驱动器号和 POSIX 分隔符，并为所述情况添加测试。