tomllib: Reading TOML Config Files Without Dependencies

Reading pyproject.toml or other TOML config files required installing the 'toml' or 'tomli' third-party library. Many tools now use TOML for configuration.

Use the built-in tomllib module (Python 3.11) to read TOML files.

import tomllib
from pathlib import Path

# Read pyproject.toml — must open in binary mode
def read_project_config() -> dict:
    config_path = Path('pyproject.toml')
    with config_path.open('rb') as f:
        return tomllib.load(f)

config = read_project_config()
print(config['project']['name'])

# Parse TOML from string
content = b'''
[server]
host = "0.0.0.0"
port = 8080
'''
settings = tomllib.loads(content.decode())

# Backwards compat (Python < 3.11)
try:
    import tomllib
except ImportError:
    import tomli as tomllib  # pip install tomli

tomllib was added to Python 3.11 stdlib (PEP 680), ending the need for third-party TOML parsers. TOML is now the standard format for Python project configuration via pyproject.toml.