first commit

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Virtual environments
+venv/
+env/
+
+# Data and reports
+data/
+reports/
+
+# Configuration files that contain secrets
+.env
+
+# OS files
+.DS_Store
+Thumbs.db

README.md

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+# My Stock Screener
+
+## Overview
+This repository contains a Python-based stock screener that evaluates multiple metrics on a set of stocks, assigns a score, and outputs a CSV of the results.
+
+## Project Structure
+- **src/** contains the main application code.
+- **data/** is where you can store raw input data; it is ignored by Git.
+- **reports/** is where generated CSV output is stored.
+
+## Setup Instructions
+1. Create a virtual environment:  
+   ```bash
+   python3 -m venv venv
+   source venv/bin/activate

requirements.txt

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+# Basic data libraries
+pandas
+numpy
+
+# Database connector
+clickhouse-connect
+
+# For scheduling or datetime manipulations (if needed)
+python-dotenv
+
+# For testing
+pytest

src/db/db_connection.py

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+
+### `src/db/db_connection.py` (ClickHouse example)
+
+```python
+import logging
+import clickhouse_connect
+import uuid
+import time
+
+def create_client(clickhouse_password):
+    """
+    Create a ClickHouse client with a unique session and retry logic.
+    """
+    max_retries = 3
+    retry_delay = 2  # seconds
+    for attempt in range(max_retries):
+        try:
+            client = clickhouse_connect.get_client(
+                host="clickhouse.abellana.work",
+                port=443,
+                username="default",
+                password=clickhouse_password,
+                secure=True,
+                session_id=str(uuid.uuid4()),
+                settings={'session_timeout': 60}
+            )
+            # Test the connection
+            client.query('SELECT 1')
+            return client
+        except Exception as e:
+            if attempt < max_retries - 1:
+                logging.warning(f"Connection attempt {attempt + 1} failed: {str(e)}")
+                time.sleep(retry_delay)
+            else:
+                raise