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Functions & basics

Reusable building blocks — parameters, returns, scope, and clear function design.

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Functions & basics easy

How to Load a .env File Manually in Python

Parse a .env-style key-value file into a Python dictionary using only the standard library, with comment and quoted-value handling.

dotenv environment-variables file-parsing
Python 
import re
from pathlib import Path


def load_dotenv_file(filepath: str) -> dict[str, str]:
    """Parse a .env-style file into a dictionary."""
    env = {}
    path = Path(filepath)

    if not path.exists():
        raise FileNotFoundError(f"Environment file not found: {filepath}")

    for line in path.read_text()…
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