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function load_config_v1

Maturity: 46

Parses a .env file and loads key-value pairs into a dictionary, ignoring comments and handling errors gracefully.

File:
/tf/active/vicechatdev/SPFCsync/grant_sharepoint_access.py
Lines:
10 - 22
Complexity:
simple

Purpose

This function provides a simple configuration loader that reads environment variables from a .env file in the current working directory. It parses each line for key=value pairs, skips comment lines (starting with #), and returns a dictionary containing all configuration values. Useful for managing application settings, API keys, and other configuration parameters without hardcoding them in source code.

Source Code

def load_config():
    """Load configuration from .env file."""
    config = {}
    try:
        with open('.env', 'r') as f:
            for line in f:
                if '=' in line and not line.strip().startswith('#'):
                    key, value = line.strip().split('=', 1)
                    config[key] = value
        return config
    except Exception as e:
        print(f"Error loading config: {e}")
        return None

Return Value

Returns a dictionary (dict) where keys are configuration variable names (strings) and values are their corresponding values (strings) from the .env file. Returns None if an error occurs during file reading or parsing (e.g., file not found, permission denied).

Usage Example

# Create a .env file first:
# API_KEY=abc123
# DATABASE_URL=postgresql://localhost/mydb
# DEBUG=true

config = load_config()
if config:
    api_key = config.get('API_KEY')
    db_url = config.get('DATABASE_URL')
    debug_mode = config.get('DEBUG') == 'true'
    print(f"API Key: {api_key}")
    print(f"Database: {db_url}")
else:
    print("Failed to load configuration")

Best Practices

  • Always check if the returned value is None before accessing configuration keys
  • Use .get() method on the returned dictionary to safely access keys with default values
  • Ensure the .env file is in the current working directory or modify the function to accept a file path parameter
  • Consider using the python-dotenv library for production applications as it handles more edge cases
  • Do not commit .env files to version control; add .env to .gitignore
  • All values are returned as strings; convert to appropriate types (int, bool, etc.) as needed
  • The function does not handle quoted values or escape sequences; values are taken as-is after the first = sign
  • Multi-line values are not supported by this implementation

Tags

configuration environment-variables file-parsing dotenv settings config-loader key-value-pairs

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