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How to Bump Version in pyproject.toml Using Regex in Python

Updates the version field in a pyproject.toml file using a regex substitution with the Python standard library.

import re
from pathlib import Path

def bump_version(pyproject_path: str, new_version: str) -> None:
    """Update version in pyproject.toml using regex."""
    path = Path(pyproject_path)
    content = path.read_text()

    # Match version = "x.y.z" (simple or PEP 440 with pre-release)
    pattern = r'^version\s*=\s*…

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