1. import os
  2. import json
  4. def compact_env_vars(env_vars, fallback_values):
  5. """
  6. Compactly outputs environment variables as JSON, with fallback values.
  8. Args:
  9. env_vars (dict): A dictionary of environment variables.
  10. fallback_values (dict): A dictionary of fallback values for missing env vars.
  12. Returns:
  13. str: A JSON string representing the compacted environment variables.
  14. """
  15. compacted_vars = {}
  16. for key, value in env_vars.items():
  17. compacted_vars[key] = value
  19. # Apply fallbacks
  20. for key, fallback in fallback_values.items():
  21. if key not in compacted_vars:
  22. compacted_vars[key] = fallback
  24. return json.dumps(compacted_vars, indent=4) #indent for readability
  28. if __name__ == '__main__':
  29. # Example Usage:
  30. env = os.environ.copy() #copy the current environment
  31. fallback = {
  32. "DATABASE_URL": "default_database_url",
  33. "API_KEY": "default_api_key",
  34. "DEBUG": True
  35. }
  37. compacted_json = compact_env_vars(env, fallback)
  38. print(compacted_json)

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