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PYTHON Snippets.

Prevent SQL Injection with Python's Psycopg2 Prepared Statements

Secure your PostgreSQL database queries in Python by using parameterized queries with the `psycopg2` library to effectively prevent SQL injection vulnerabilities.

Implement Robust Server-Side Input Validation in Python Flask

Secure your Flask API by implementing comprehensive server-side input validation, ensuring data integrity and preventing common vulnerabilities like injection attacks.

Sanitize String for URL Slug Generation

A Python snippet for converting a string into a clean, URL-friendly slug by replacing special characters and spaces with hyphens.

Python API Client with Exponential Backoff Retries

Create a robust Python API client that automatically retries failed HTTP requests with exponential backoff, ideal for handling transient network issues and API rate limits.

Implement CSRF Protection with Secure Tokens in Flask

Protect your Flask web applications from Cross-Site Request Forgery (CSRF) attacks by generating and validating secure, unique tokens for each user session.

Securely Hash User Passwords with Bcrypt in Python

Learn to securely store user passwords in Python using the `bcrypt` library. Bcrypt provides strong, adaptive hashing, crucial for protecting sensitive user data.

Extract All URLs from a String

A powerful Python regex pattern to find and extract all valid URLs (HTTP/HTTPS) embedded within a larger text string for content parsing.

Remove Script Tags from Input String

A Python regex pattern to effectively sanitize user input by stripping out potentially malicious `<script>` tags, preventing XSS vulnerabilities.

Securely Load Environment Variables with Python-dotenv

Prevent sensitive data exposure by loading environment variables from a .env file into your Python application. This snippet demonstrates safe configuration management.

Validate URLs to Prevent Server-Side Request Forgery (SSRF)

Protect your web application from SSRF attacks by strictly validating URLs before making server-side requests. This Python snippet shows how to check hostnames.

Grouping Data with collections.defaultdict

Learn to efficiently group items by a key into lists or other data structures using Python's `collections.defaultdict`, perfect for processing API data.

Define Structured Data with Python dataclasses

Learn to create clear, type-hinted data structures for API requests, responses, or configurations using Python's `dataclasses` module, enhancing code readability.