Python Classroom notes 10/May/2026

Problem statement

• Establishing communication between Two applications running in same machine
  • Using files or streams
  • Remoting

• Establishing communication between Two applications running in different machines

  • Remoting (Technology specific)
  • Webservices (SOAP) => (client is fat and data exchanges are bulky)
  • HTTP Clients and data format is mostly json
    • REST APIs
    • GraphQL APIS
    • GRPC (Google Remote Procedural calls)

• HTTP

  • Request
    • to whom => url
    • Action/verb:
      • GET
      • POST
      • PUT
      • DELETE
      • HEAD
    • headers
    • body
  • Response
    • Status Code: 3 digit number (100-599)
      • 1xx => information
      • 2xx => success
      • 3xx => Redirection
      • 4xx => Client errors
      • 5xx => server side error
    • headers
    • body

• REST API is an architectural style.

  • Think in terms of nouns and verbs
  • nouns becomes resources
  • verbs becoms actions