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| from collections import defaultdict | |
| from datetime import datetime, timezone | |
| from typing import Dict, List | |
| # Constants | |
| DEFAULT_ELO = 1200 # Starting ELO for new models | |
| K_FACTOR = 32 # Standard chess K-factor | |
| def get_leaderboard(model_data: Dict, voting_data: List, show_preliminary=True): | |
| """Generate leaderboard data using votes from MongoDB.""" | |
| # Initialize dictionaries for tracking | |
| ratings = defaultdict(lambda: DEFAULT_ELO) | |
| matches = defaultdict(int) | |
| # Process each vote | |
| for vote in voting_data: | |
| try: | |
| model_a = vote.get("model_a") | |
| model_b = vote.get("model_b") | |
| winner = vote.get("winner") | |
| # Skip if models aren't in current model_data | |
| if ( | |
| not all([model_a, model_b, winner]) | |
| or model_a not in model_data | |
| or model_b not in model_data | |
| ): | |
| continue | |
| # Update match counts | |
| matches[model_a] += 1 | |
| matches[model_b] += 1 | |
| # Calculate ELO changes | |
| elo_a = ratings[model_a] | |
| elo_b = ratings[model_b] | |
| # Expected scores | |
| expected_a = 1 / (1 + 10 ** ((elo_b - elo_a) / 400)) | |
| expected_b = 1 - expected_a | |
| # Actual scores | |
| score_a = 1 if winner == "A" else 0 if winner == "B" else 0.5 | |
| score_b = 1 - score_a | |
| # Update ratings | |
| ratings[model_a] += K_FACTOR * (score_a - expected_a) | |
| ratings[model_b] += K_FACTOR * (score_b - expected_b) | |
| except Exception as e: | |
| print(f"Error processing vote: {e}") | |
| continue | |
| # Generate leaderboard data | |
| leaderboard = [] | |
| for model in model_data.keys(): | |
| votes = matches[model] | |
| # Skip models with < 500 votes if show_preliminary is False | |
| if not show_preliminary and votes < 500: | |
| continue | |
| elo = ratings[model] | |
| ci = 1.96 * (400 / (votes + 1) ** 0.5) if votes > 0 else 0 | |
| data = { | |
| "Model": model, | |
| "ELO Score": f"{int(elo)}", | |
| "95% CI": f"±{int(ci)}", | |
| "# Votes": votes, | |
| "Organization": model_data[model]["organization"], | |
| "License": model_data[model]["license"], | |
| } | |
| leaderboard.append(data) | |
| # Sort leaderboard by ELO score in descending order | |
| leaderboard.sort(key=lambda x: float(x["ELO Score"]), reverse=True) | |
| return leaderboard | |
| def get_leaderboard_stats(model_data: Dict, voting_data: List) -> str: | |
| """Get summary statistics for the leaderboard.""" | |
| now = datetime.now(timezone.utc) | |
| total_votes = len(voting_data) | |
| total_models = len(model_data) | |
| last_updated = now.replace(minute=0, second=0, microsecond=0).strftime( | |
| "%B %d, %Y at %H:00 UTC" | |
| ) | |
| return f""" | |
| ### Leaderboard Stats | |
| - **Total Models**: {total_models} | |
| - **Total Votes**: {total_votes} | |
| - **Last Updated**: {last_updated} | |
| """ | |
| def calculate_elo_change(rating_a: float, rating_b: float, winner: str) -> tuple[float, float]: | |
| """Calculate ELO rating changes for both players.""" | |
| expected_a = 1 / (1 + 10 ** ((rating_b - rating_a) / 400)) | |
| expected_b = 1 - expected_a | |
| if winner == "A": | |
| score_a, score_b = 1, 0 | |
| elif winner == "B": | |
| score_a, score_b = 0, 1 | |
| else: # Handle ties | |
| score_a, score_b = 0.5, 0.5 | |
| change_a = K_FACTOR * (score_a - expected_a) | |
| change_b = K_FACTOR * (score_b - expected_b) | |
| return change_a, change_b | |
| def get_model_rankings(leaderboard: List[Dict]) -> Dict[str, int]: | |
| """Get current rankings of all models from leaderboard data.""" | |
| return {entry["Model"]: idx + 1 for idx, entry in enumerate(leaderboard)} |