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ported backend to python

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Karma Riuk
2025-05-13 13:27:38 +02:00
parent e5bd1d3a08
commit 3a4bfd611b
22 changed files with 330 additions and 658 deletions
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256
.gitignore vendored
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@ -1,136 +1,174 @@
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*.so
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.Python
build/
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*.egg-info/
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*.egg
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*.manifest
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*.py,cover
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*.log *.log
npm-debug.log* local_settings.py
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8
jest.config.js
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export default {
transform: {},
moduleNameMapper: {
'^(\\.{1,2}/.*)\\.js$': '$1',
},
testEnvironment: 'node',
verbose: true
};

23
package.json
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{
"name": "crab-webapp",
"description": "Crab Webapp",
"type": "module",
"main": "src/server.js",
"scripts": {
"start": "node src/server.js",
"dev": "nodemon src/server.js",
"test": "node --experimental-vm-modules node_modules/jest/bin/jest.js"
},
"dependencies": {
"cors": "^2.8.5",
"dotenv": "^16.3.1",
"express": "^4.18.2",
"multer": "^1.4.5-lts.1",
"socket.io": "^4.8.1"
},
"devDependencies": {
"jest": "^29.7.0",
"nodemon": "^3.0.2",
"supertest": "^6.3.4"
}
}

2
public/index.html
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@ -7,7 +7,7 @@
<link rel="icon" type="image/x-icon" href="/img/crab.png"> <link rel="icon" type="image/x-icon" href="/img/crab.png">
<title>Dataset Downloader & Answer Uploader</title> <title>Dataset Downloader & Answer Uploader</title>
<link rel="stylesheet" href="css/style.css"> <link rel="stylesheet" href="css/style.css">
<script src="/socket.io/socket.io.js"></script> <script src="https://cdn.socket.io/4.5.4/socket.io.min.js"></script>
<script defer src="js/index.js"></script> <script defer src="js/index.js"></script>
<script defer src="js/sorttable.js"></script> <script defer src="js/sorttable.js"></script>
</head> </head>

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public/js/index.js
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@ -60,7 +60,7 @@ document.getElementById("upload-btn").onclick = async () => {
idCell.textContent = id; idCell.textContent = id;
commentCell.innerHTML = `<span class='comment-cell'>${info["proposed_comment"]}</span>`; commentCell.innerHTML = `<span class='comment-cell'>${info["proposed_comment"]}</span>`;
scoreCell.textContent = info["max_bleu_score"].toFixed(4); scoreCell.textContent = info["max_bleu_score"];
}); });
}; };

92
src/routes/__tests__/datasets.test.js
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import { jest } from '@jest/globals';
import express from 'express';
import request from 'supertest';
import { join } from 'path';
import { fileURLToPath } from 'url';
import { dirname } from 'path';
import datasetsRouter from '../datasets.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
// Mock the paths utility
jest.mock('../../utils/paths.js', () => ({
getProjectPath: (path) => join(__dirname, '../../..', path)
}));
// Create Express app for testing
const app = express();
app.use('/datasets', datasetsRouter);
describe('Datasets Router', () => {
// Mock environment variables
const originalEnv = process.env;
beforeEach(() => {
jest.resetModules();
process.env = { ...originalEnv };
process.env.DATA_DIR = './test-data';
});
afterEach(() => {
process.env = originalEnv;
});
describe('GET /download/:dataset', () => {
it('should return 400 for invalid dataset name', async () => {
const response = await request(app)
.get('/datasets/download/invalid_dataset')
.expect(400);
expect(response.body).toEqual({
error: 'Invalid dataset name'
});
});
it('should download comment_generation without context', async () => {
const response = await request(app)
.get('/datasets/download/comment_generation')
.expect(200);
expect(response.headers['content-type']).toBe('application/zip');
expect(response.headers['content-disposition']).toContain('comment_generation_no_context.zip');
});
it('should download comment_generation with context', async () => {
const response = await request(app)
.get('/datasets/download/comment_generation')
.query({ withContext: true })
.expect(200);
expect(response.headers['content-type']).toBe('application/zip');
expect(response.headers['content-disposition']).toContain('comment_generation_with_context.zip');
});
it('should download code_refinement without context', async () => {
const response = await request(app)
.get('/datasets/download/code_refinement')
.expect(200);
expect(response.headers['content-type']).toBe('application/zip');
expect(response.headers['content-disposition']).toContain('code_refinement_no_context.zip');
});
it('should download code_refinement with context', async () => {
const response = await request(app)
.get('/datasets/download/code_refinement')
.query({ withContext: true })
.expect(200);
expect(response.headers['content-type']).toBe('application/zip');
expect(response.headers['content-disposition']).toContain('code_refinement_with_context.zip');
});
it('should handle JSON boolean for withContext parameter', async () => {
const response = await request(app)
.get('/datasets/download/comment_generation')
.query({ withContext: 'true' })
.expect(200);
expect(response.headers['content-disposition']).toContain('comment_generation_with_context.zip');
});
});
});

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src/routes/answers.js
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import { Router } from "express";
import multer from "multer";
import { InvalidJsonFormatError } from "../utils/errors.js";
import { evaluate_comments } from "../utils/process_data.js";
const router = Router();
// Configure multer for file uploads
const upload = multer({
storage: multer.memoryStorage(),
limits: {
fileSize: 200 * 1024 * 1024, // 200MB limit, since the comement gen is 147MB (deflated)
},
fileFilter: (_req, file, cb) => {
// Accept only JSON files
if (file.mimetype === "application/json") {
cb(null, true);
} else {
cb(new Error("Only JSON files are allowed"));
}
},
});
// Helper function to validate JSON format
const validateJsonFormat = (data) => {
try {
const parsed = JSON.parse(data);
// Check if it's an object
if (
typeof parsed !== "object" ||
parsed === null ||
Array.isArray(parsed)
) {
throw new InvalidJsonFormatError(
"Submitted json doesn't contain an object",
);
}
// Check if all values are strings
if (
!Object.values(parsed).every((value) => typeof value === "string")
) {
throw new InvalidJsonFormatError(
"Submitted json object must only be str -> str. Namely id -> comment",
);
}
return parsed;
} catch (error) {
if (error instanceof InvalidJsonFormatError) {
throw error;
}
throw new InvalidJsonFormatError("Invalid JSON format");
}
};
router.post("/submit/comments", upload.single("file"), async (req, res) => {
try {
if (!req.file) {
return res.status(400).json({ error: "No file uploaded" });
}
const fileContent = req.file.buffer.toString();
let validatedData;
try {
validatedData = validateJsonFormat(fileContent);
} catch (error) {
if (error instanceof InvalidJsonFormatError) {
return res.status(400).json({
error: "Invalid JSON format",
message: error.message,
});
}
throw error;
}
const io = req.app.get("io");
const header = req.get("X-Socket-Id");
const socketId = header && header.trim();
if (socketId && io.sockets.sockets.has(socketId)) {
io.to(socketId).emit("successul-upload");
io.to(socketId).emit("started-processing");
}
const results = evaluate_comments(validatedData, (percent) => {
if (!(socketId && io.sockets.sockets.has(socketId))) return;
io.to(socketId).emit("progress", { percent });
});
res.status(200).json(results);
} catch (error) {
console.error("Error processing submission:", error);
res.status(500).json({ error: "Error processing submission" });
}
});
router.post("/submit/refinement", upload.single("file"), async (req, res) => {
try {
if (!req.file) {
return res.status(400).json({ error: "No file uploaded" });
}
const fileContent = req.file.buffer.toString();
let validatedData;
try {
validatedData = validateJsonFormat(fileContent);
} catch (error) {
if (error instanceof InvalidJsonFormatError) {
return res.status(400).json({
error: "Invalid JSON format",
message: error.message,
});
}
throw error;
}
socket.emit("started-processing");
evaluate_comments(validatedData);
res.status(200).json({
message: "Answer submitted successfully",
data: validatedData,
});
} catch (error) {
console.error("Error processing submission:", error);
res.status(500).json({ error: "Error processing submission" });
}
});
export default router;

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src/routes/answers.py Normal file
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# routes/answers.py
from flask import Blueprint, request, jsonify, current_app
from utils.errors import InvalidJsonFormatError
from utils.process_data import evaluate_comments
import json
router = Blueprint('answers', __name__, url_prefix='/answers')
ALLOWED_EXT = {'json'}
def validate_json_format(data: str) -> dict[str, str]:
try:
obj = json.loads(data)
if not isinstance(obj, dict):
raise InvalidJsonFormatError("Submitted json doesn't contain an object")
if not all(isinstance(v, str) for v in obj.values()):
raise InvalidJsonFormatError(
"Submitted json object must only be str -> str. Namely id -> comment"
)
return obj
except InvalidJsonFormatError as e:
raise e
except Exception:
raise InvalidJsonFormatError()
@router.route('/submit/comments', methods=['POST'])
def submit_comments():
file = request.files.get('file')
if file is None or file.filename is None or file.filename.split('.')[-1] not in ALLOWED_EXT:
return jsonify({'error': 'Only JSON files are allowed'}), 400
data = file.read().decode()
try:
validated = validate_json_format(data)
except InvalidJsonFormatError as e:
return jsonify({'error': 'Invalid JSON format', 'message': str(e)}), 400
socketio = current_app.extensions['socketio']
sid = request.headers.get('X-Socket-Id')
if sid:
socketio.emit('successful-upload', room=sid)
socketio.emit('started-processing', room=sid)
results = evaluate_comments(
validated, lambda p: socketio.emit('progress', {'percent': p}, room=sid)
)
return jsonify(results)
@router.route('/submit/refinement', methods=['POST'])
def submit_refinement():
file = request.files.get('file')
# similar to above
return jsonify({'message': 'Answer submitted successfully'})

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src/routes/datasets.js
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@ -1,33 +0,0 @@
import { Router } from "express";
import { join } from "path";
import { getProjectPath } from "../utils/paths.js";
const router = Router();
// Environment variables for paths (all relative to project root)
const DATA_DIR = getProjectPath("data");
const DATASETS = ["comment_generation", "code_refinement"];
router.get("/download/:dataset", async (req, res) => {
const { dataset } = req.params;
const withContext = req.query.withContext
? JSON.parse(req.query.withContext)
: false;
if (!DATASETS.includes(dataset)) {
return res.status(400).json({ error: "Invalid dataset name" });
}
const fileName = `${dataset}_${withContext ? "with_context" : "no_context"}.zip`;
const filePath = join(DATA_DIR, fileName);
try {
res.download(filePath);
} catch (error) {
console.error("Error serving file:", error);
res.status(500).json({ error: "Error serving file" });
}
});
export default router;

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src/routes/datasets.py Normal file
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@ -0,0 +1,17 @@
# routes/datasets.py
from flask import Blueprint, send_from_directory, request, jsonify
from utils.paths import get_project_path
router = Blueprint('datasets', __name__, url_prefix='/datasets')
DATASETS = {'comment_generation', 'code_refinement'}
DATA_DIR = get_project_path('../data')
@router.route('/download/<dataset>')
def download(dataset):
if dataset not in DATASETS:
return jsonify({'error': 'Invalid dataset name'}), 400
with_ctx = request.args.get('withContext', 'false').lower() == 'true'
fname = f"{dataset}_{'with_context' if with_ctx else 'no_context'}.zip"
return send_from_directory(DATA_DIR, fname, as_attachment=True)

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src/routes/index.js
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@ -1,23 +0,0 @@
import { Router } from 'express';
import datasetRoutes from './datasets.js';
import answerRoutes from './answers.js';
const router = Router();
// Routes
router.get('/', (_req, res) => {
res.json({ message: 'Welcome to the Express backend!' });
});
// Example route
router.get('/api/hello', (_req, res) => {
res.json({ message: 'Hello from the backend!' });
});
// Dataset routes
router.use('/datasets', datasetRoutes);
// Answer submission routes
router.use('/answers', answerRoutes);
export default router;

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src/routes/index.py Normal file
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# routes/index.py
from flask import Blueprint, jsonify, current_app
router = Blueprint('index', __name__)
@router.route('/')
def welcome():
print("hello")
return current_app.send_static_file('index.html')
@router.route('/api/hello')
def hello():
return jsonify({'message': 'Hello from the backend!'})

25
src/server.js
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import express, { json } from "express";
import cors from "cors";
import dotenv from "dotenv";
import routes from "./routes/index.js";
import { createSocketServer } from "./socket.js";
dotenv.config();
const app = express();
const port = process.env.PORT || 3000;
// Middleware
app.use(cors());
app.use(json());
// Use routes
app.use(express.static("public"));
app.use("/", routes);
const server = createSocketServer(app);
// Start server
server.listen(port, () => {
console.log(`Server is running on port ${port}`);
});

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src/server.py Normal file
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# server.py
from flask import Flask
from flask_cors import CORS
from flask_socketio import SocketIO
from routes.index import router as index_router
from routes.answers import router as answers_router
from routes.datasets import router as datasets_router
import os
app = Flask(__name__, static_folder='../public', static_url_path='/')
CORS(app)
# Register routes
app.register_blueprint(index_router) # serves '/' and '/api/hello'
app.register_blueprint(answers_router) # mounts at '/answers'
app.register_blueprint(datasets_router) # mounts at '/datasets'
def init_socketio(app):
socketio = SocketIO(app, cors_allowed_origins='*')
@socketio.on('connect')
def _():
print('Websocket client connected')
return socketio
# Init socketio
socketio = init_socketio(app)
if __name__ == '__main__':
port = int(os.getenv('PORT', 3000))
socketio.run(app, port=port)

14
src/socket.js
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import http from "http";
import { Server } from "socket.io";
function onConnect(socket) {
console.log("Websocket client connected:", socket.id);
}
export function createSocketServer(app) {
const httpServer = http.createServer(app);
const io = new Server(httpServer);
io.on("connection", onConnect);
app.set("io", io);
return httpServer;
}

125
src/utils/bleu.js
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/*
* Calculates BLEU score between a reference and candidate sentence.
* Reference and candidate should be token arrays (e.g. split by whitespace).
* We compute modified n-gram precisions for n=1..4, geometric mean, with smoothing (optional).
* We include the brevity penalty.
*/
/**
* Extracts n-grams from a sequence of tokens.
* @param {string[]} tokens - Array of tokens.
* @param {number} n - Size of the n-gram.
* @returns {Object} Map from n-gram string to its count.
*/
function getNGramCounts(tokens, n) {
const counts = Object.create(null);
for (let i = 0; i + n <= tokens.length; i++) {
const gram = tokens.slice(i, i + n).join(" ");
counts[gram] = (counts[gram] || 0) + 1;
}
return counts;
}
/**
* Computes modified precision for a given n.
* @param {string[]} reference - Reference token array.
* @param {string[]} candidate - Candidate token array.
* @param {number} n - n-gram order.
* @returns {number} Modified n-gram precision.
*/
function modifiedPrecision(reference, candidate, n) {
const refCounts = getNGramCounts(reference, n);
const candCounts = getNGramCounts(candidate, n);
let matchCount = 0;
let totalCount = 0;
for (const gram in candCounts) {
const countCand = candCounts[gram];
const countRef = refCounts[gram] || 0;
matchCount += Math.min(countCand, countRef);
totalCount += countCand;
}
// Avoid division by zero
return totalCount === 0 ? 0 : matchCount / totalCount;
}
/**
* Computes brevity penalty.
* @param {number} refLength - Length of reference sentence.
* @param {number} candLength - Length of candidate sentence.
* @returns {number} Brevity penalty.
*/
function brevityPenalty(refLength, candLength) {
if (candLength > refLength) {
return 1;
}
if (candLength === 0) {
return 0;
}
return Math.exp(1 - refLength / candLength);
}
/**
* Computes BLEU score.
* @param {string} refSentence - Reference sentence.
* @param {string} candSentence - Candidate sentence.
* @param {number} maxN - Maximum n-gram order (default=4).
* @param {boolean} smooth - Whether to apply smoothing (default=false).
* @returns {number} BLEU score between 0 and 1.
*/
export function bleu(refSentence, candSentence, maxN = 4, smooth = false) {
const reference = refSentence.trim().split(/\s+/);
const candidate = candSentence.trim().split(/\s+/);
const refLen = reference.length;
const candLen = candidate.length;
// count how many times we've hit a zero count so far
const precisions = [];
for (let n = 1; n <= maxN; n++) {
let p = modifiedPrecision(reference, candidate, n);
if (p === 0 && smooth) {
p = 1 / Math.pow(candLen, n);
}
precisions.push(p);
}
// Compute geometric mean of precisions
// if any precision is zero (and no smoothing), BLEU=0
if (precisions.some((p) => p === 0)) {
return 0;
}
const logPrecisionSum =
precisions.map((p) => Math.log(p)).reduce((a, b) => a + b, 0) / maxN;
const geoMean = Math.exp(logPrecisionSum);
const bp = brevityPenalty(refLen, candLen);
return bp * geoMean;
}
// if __name__ == "__main__"
if (process.argv[1] === import.meta.filename) {
const test_pairs = [
["the cat is on the mat", "the cat is on the mat"],
["the cat is on the mat", "the the the the the the the"],
["the cat is on the mat", "the cat on the mat"],
["the cat is on the mat", "the cat is on the"],
["the cat is on the mat", "foo bar baz qux"],
[
"The quick brown fox jumps over the lazy dog",
"The quick brown dog jumps over the lazy fox",
],
[
"This could be `static` to prevent any funkiness, i.e. attempting to use class state during the constructor or similar.",
"This could be `static` to prevent any funkiness, i.e. attempting to use class state during the constructor or similar.",
],
];
for (const [reference, candidate] of test_pairs) {
const score = bleu(reference, candidate, 4);
console.log(`reference: ${reference}`);
console.log(`candidate: ${candidate}`);
console.log(`BLEU score: ${score.toFixed(4)}`);
}
}

6
src/utils/errors.js
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@ -1,6 +0,0 @@
export class InvalidJsonFormatError extends Error {
constructor(message = 'JSON must be an object mapping strings to strings') {
super(message);
this.name = 'InvalidJsonFormatError';
}
}

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class InvalidJsonFormatError(Exception):
def __init__(self, message='JSON must be an object mapping strings to strings'):
super().__init__(message)
self.name = 'InvalidJsonFormatError'

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src/utils/paths.js
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import { fileURLToPath } from 'url';
import { dirname, join } from 'path';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
// Get the project root directory (2 levels up from src/utils)
export const PROJECT_ROOT = join(__dirname, '../..');
// Helper function to create paths relative to project root
export const getProjectPath = (relativePath) => join(PROJECT_ROOT, relativePath);

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src/utils/paths.py Normal file
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# utils/paths.py
from pathlib import Path
PROJECT_ROOT = Path(__file__).resolve().parent.parent
def get_project_path(relative_path: str) -> Path:
return PROJECT_ROOT / relative_path

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src/utils/process_data.js
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import fs from "fs";
import { getProjectPath } from "../utils/paths.js";
import { bleu } from "../utils/bleu.js";
function buildReferenceMap(dataset_path) {
const referenceMap = {};
const dataset = JSON.parse(fs.readFileSync(dataset_path));
for (const entry of dataset.entries) {
const id = entry.metadata.id;
const comments = entry.comments;
referenceMap[id] = comments.map((c) => c.body);
}
return referenceMap;
}
const REFERENCE_MAP = buildReferenceMap(getProjectPath("data/dataset.json"));
export const evaluate_comments = (answers, percent_cb) => {
const total = Object.keys(answers).length;
let i = 0;
const results = {};
for (const [id, generated_comment] of Object.entries(answers)) {
const n_tokens_generated = generated_comment.trim().split(/\s+/).length;
if (!(id in REFERENCE_MAP)) {
console.error(`id: "${id}" is not present in the dataset`);
continue;
}
const paraphrases = REFERENCE_MAP[id];
let maxScore = 0;
const scores = [];
for (const paraphrase of paraphrases) {
const n_tokens_paraphrase = paraphrase.trim().split(/\s+/).length;
const max_n = Math.min(n_tokens_generated, n_tokens_paraphrase, 4);
const score = bleu(paraphrase, generated_comment, max_n);
scores.push(score);
maxScore = Math.max(score, maxScore);
}
results[id] = {
max_bleu_score: maxScore,
bleu_scores: scores,
proposed_comment: generated_comment,
};
percent_cb(Math.floor((++i / total) * 100));
}
return results;
};
export const evaluate_refinement = (answers, percent_cb) => {
const total = Object.keys(answers).length;
let i = 0;
for (const [key, value] of Object.entries(answers)) {
console.log(`Processing ${key}: ${value}...`);
// await new Promise((res) => setTimeout(res, 1000));
console.log("Done");
percent_cb(Math.floor((++i / total) * 100));
}
};

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# utils/process_data.py
import json
import sys
from .paths import get_project_path
from sacrebleu import sentence_bleu as bleu
def build_reference_map(dataset_path: str) -> dict[str, list[str]]:
ref_map = {}
data = json.loads(open(dataset_path).read())
for entry in data['entries']:
id_ = entry['metadata']['id']
comments = entry['comments']
ref_map[id_] = [c['body'] for c in comments]
return ref_map
REFERENCE_MAP = build_reference_map(str(get_project_path('../data/dataset.json')))
def evaluate_comments(answers: dict[str, str], percent_cb):
total = len(answers)
results = {}
for i, (id_, gen) in enumerate(answers.items(), 1):
if id_ not in REFERENCE_MAP:
print(f'id: "{id_}" is not present in the dataset', file=sys.stderr)
continue
paraphrases = REFERENCE_MAP[id_]
max_score = 0.0
scores = []
for p in paraphrases:
score = bleu(gen, [p]).score
scores.append(score)
max_score = max(max_score, score)
results[id_] = {'max_bleu_score': max_score, 'bleu_scores': scores, 'proposed_comment': gen}
percent_cb(int(i / total * 100))
return results
def evaluate_refinement(answers: dict[str, str], percent_cb):
total = len(answers)
for i, (key, value) in enumerate(answers.items(), 1):
print(f"Processing {key}: {value}...")
# time.sleep(1)
print("Done")
percent_cb(int(i / total * 100))