How to Implement JWT Authentication with Custom Middleware Security

JSON Web Tokens (JWT) provide stateless, secure authentication for REST APIs. Combining JWT with custom middleware enables advanced security patterns—such as request validation, rate limiting, and role-based access control—at the middleware layer. This guide uses Django REST Framework (DRF) and djangorestframework-simplejwt to implement robust JWT authentication and middleware-based security.

How to create custom bokeh widgets

Custom widgets empower you to extend Bokeh’s functionality beyond built-in models by writing small TypeScript/JavaScript components that integrate seamlessly with Python. This guide walks through setting up your development environment, building a widget, packaging it, and deploying to Bokeh server or standalone documents.

How to Scale Bokeh Applications for Production

Scaling Bokeh applications to support many concurrent users and large data workloads requires robust architectural patterns: multi-process servers, load balancing for WebSockets, container orchestration, and autoscaling. This guide consolidates production strategies and best practices to ensure your Bokeh apps remain responsive and reliable under heavy traffic.

How to Identify Memory Issues in Bokeh Applications

Memory issues in Bokeh applications can manifest as browser crashes, slow rendering, server instability, or gradual RAM consumption growth—especially when using Jupyter notebooks, large datasets, or complex interactive dashboards. This comprehensive guide provides actionable techniques for identifying, diagnosing, and resolving memory problems using proven Python profiling tools and Bokeh-specific debugging strategies.

How to optimize bokeh memory usage

Bokeh is a powerful Python library for interactive data visualization, but apps at scale can suffer from memory leaks and excessive RAM usage—especially when used with Holoviews, Panel, Datashader, large dataframes, or custom session logic. This article provides actionable techniques for professional developers to minimize Bokeh server memory consumption, grounded in real-world debugging and best-practice Continue reading

How to Troubleshoot NoValidConnectionsError: Network Connectivity and Server Reachability in Paramiko

The paramiko.ssh_exception.NoValidConnectionsError is a specific type of exception raised by Paramiko when it attempts to establish an SSH connection but fails to connect to any of the resolved IP addresses for the given hostname and port. This error essentially means: “I tried all the ways I know to connect to that server, and none of Continue reading

How to Resolve SSHException: Key exchange negotiation failed: Cipher Mismatch and Algorithm Issues in Paramiko

The SSHException: Key exchange negotiation failed is a common and often frustrating error encountered when using Paramiko to connect to an SSH server. This error indicates that the client (Paramiko) and the server could not agree on a common set of cryptographic algorithms for the SSH handshake. This usually boils down to a “cipher mismatch”, Continue reading