How to Parse Terraform Plan Output in Python

import json
from typing import Dict, List

def parse_terraform_plan_output(plan_output_text: str) -> Dict[str, List[str]]:
    """
    Parses a mock Terraform plan output text into a structured dictionary.
    """
    parsed: Dict[str, List[str]] = {"add": [], "change": [], "destroy": []}

    for line in plan_output_text.splitlines():
        line = line.strip()
        if line.startswith("+ "):
            parsed["add"].append(line[2:].strip())
        elif line.startswith("~ "):
            parsed["change"].append(line[2:].strip())
        elif line.startswith("- "):
            parsed["destroy"].append(line[2:].strip())

    return parsed

if __name__ == "__main__":
    mock_plan = """
    + aws_instance.web
    ~ aws_security_group.sg (updated in-place)
    - aws_db_instance.db
    + aws_s3_bucket.bucket
    ~ aws_subnet.subnet (updated in-place)
    Not a change line
    """
    result = parse_terraform_plan_output(mock_plan)
    print(json.dumps(result, indent=2))