What is the role of an API gateway in a microservices architecture, and how can I implement it using tools like NGINX or Kong for Python-based services?

An API gateway in a microservices architecture acts as the entry point for all client requests, routing them to appropriate services. It simplifies client interaction and can handle cross-cutting concerns like authentication, rate limiting, and logging. To implement it, you can use a tool like NGINX or Kong. Namely, both offer reverse proxy capabilities and plugins for added functionality. Configure routing rules to forward requests to the corresponding microservice. Also, consider implementing service discovery for dynamic routing in a rapidly changing environment.