fix: lint, workflow checks fixed

Author: ayushkrtiwari

.ruff.toml

@@ -0,0 +1,21 @@
+# Exclude non-Python files, build artifacts and frontend bundles from ruff scanning
+exclude = [
+  "**/dist/**",
+  "**/node_modules/**",
+  "**/__pycache__/**",
+  "**/*.pyc",
+  "requirements*.txt",
+  "tracked.txt",
+  "pytest.ini",
+  ".git",
+  ".github",
+  "src/quant_research_starter/frontend/cauweb/dist/**"
+]
+
+# Project line length
+line-length = 88
+
+# Lint-specific settings
+[lint]
+# Use this to extend ignored error codes (legacy key moved here)
+extend-ignore = []

examples/csv_validation_example.py

@@ -84,9 +84,9 @@ def load_and_validate_prices(file_path: str):
         print(f"✓ Loaded {len(prices)} rows of price data")
         return prices
 
-    # Try with a file
+    # Try with a file (we only demonstrate loading; don't keep the returned value)
     try:
-        prices = load_and_validate_prices("data/sample_prices.csv")
+        load_and_validate_prices("data/sample_prices.csv")
     except ValueError as e:
         print(f"✗ Error: {e}")
     except FileNotFoundError:

notebooks/01-getting-started.ipynb

@@ -388,7 +388,7 @@
     "# Backtest\n",
     "common = prices.index.intersection(signals.index)\n",
     "px = prices.loc[common]\n",
-    "sg = pd.DataFrame({c: signals['composite'] for c in px.columns}, index=signals.index).loc[common]\n",
+    "sg = pd.DataFrame(dict.fromkeys(px.columns, signals['composite']), index=signals.index).loc[common]\n",
     "\n",
     "bt = VectorizedBacktest(px, sg, initial_capital=100000)\n",
     "results = bt.run(weight_scheme=\"rank\")\n",

scripts/run_migrations.py

@@ -4,8 +4,9 @@
     python scripts/run_migrations.py
 """
 import os
-from alembic.config import Config
+
 from alembic import command
+from alembic.config import Config
 
 here = os.path.dirname(__file__)
 alembic_cfg = Config(os.path.join(here, "..", "alembic.ini"))

scripts/wait_for_services.py

@@ -5,9 +5,9 @@
 are available before starting the web server or worker.
 """
 import os
-import time
 import socket
 import sys
+import time
 
 
 def wait_tcp(host: str, port: int, timeout: int = 60) -> bool:

src/quant_research_starter/api/auth.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import os
+import secrets
 from datetime import datetime, timedelta
 from typing import Annotated, Optional
 
@@ -12,9 +13,7 @@
 from passlib.context import CryptContext
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from . import db, models
-from . import supabase
-import secrets
+from . import db, models, supabase
 
 SECRET_KEY = os.getenv("JWT_SECRET", "dev-secret-change-me")
 ALGORITHM = "HS256"

src/quant_research_starter/api/routers/auth.py

@@ -6,8 +6,7 @@
 from fastapi.security import OAuth2PasswordRequestForm
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from .. import auth, db, models, schemas
-from .. import supabase
+from .. import auth, db, models, schemas, supabase
 
 router = APIRouter(prefix="/api/auth", tags=["auth"])
 
@@ -23,7 +22,7 @@ async def register_user(
         try:
             supabase.signup(user_in.username, user_in.password)
         except Exception as exc:
-            raise HTTPException(status_code=400, detail=str(exc))
+            raise HTTPException(status_code=400, detail=str(exc)) from exc
 
     q = await session.execute(
         models.User.__table__.select().where(models.User.username == user_in.username)
@@ -52,7 +51,7 @@ async def login_for_access_token(
             # token_response may contain access_token and refresh_token
             return {"access_token": token_response.get("access_token"), "token_type": "bearer"}
         except Exception as exc:
-            raise HTTPException(status_code=400, detail=str(exc))
+            raise HTTPException(status_code=400, detail=str(exc)) from exc
 
     q = await session.execute(
         models.User.__table__.select().where(models.User.username == form_data.username)

test_conn.py

@@ -1,7 +1,9 @@
 # test_conn.py
 import asyncio
+
 import asyncpg
 
+
 async def main():
     try:
         conn = await asyncpg.connect(user='postgres', password='password',