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Python Code Samples

Medium snippets you can copy, study, and run in the browser editor.

4 matches
API design & gRPC medium

Build a Mock REST API with PUT and GET in Python

A minimal mock REST server implementing idempotent PUT for resource replacement and GET for retrieval, built with Python's http.server module.

rest-api http-server mock
Python
from http.server import BaseHTTPRequestHandler, HTTPServer
import json
from urllib.parse import urlparse

mock_db = {}

class MockAPIHandler(BaseHTTPRequestHandler):
    def do_PUT(self):
        parsed = urlparse(self.path)
        resource_id = parsed.path.strip("/").split("/")[-1]
        content_length = int(self.…
15 0 Open
API design & gRPC medium

How to Build a Mock REST GET Endpoint Handler in Python

Create a lightweight mock REST GET server in Python using the standard library, with a dict-based route registry that maps paths to handler functions and returns JSON responses with proper HTTP status codes.

mock-server rest-api http
Python
from http.server import BaseHTTPRequestHandler, HTTPServer
import json

# Mock API handler registry
def handle_users():
    return {"status": "ok", "data": [{"id": 1, "name": "Alice"}, {"id": 2, "name": "Bob"}]}

def handle_products():
    return {"status": "ok", "data": [{"id": 101, "name": "Laptop", "price": 999.99}…
14 0 Open
API design & gRPC medium

How to Build an Idempotency-Key POST Handler in Python

Python HTTP server mock that accepts POST requests and deduplicates them using an Idempotency-Key header, returning the same response for repeated calls.

http-server idempotency api-mock
Python
import hashlib
import json
from http.server import BaseHTTPRequestHandler, HTTPServer
from urllib.parse import urlparse


class MockAPI(BaseHTTPRequestHandler):
    responses = {}

    def do_POST(self):
        length = int(self.headers.get("Content-Length", 0))
        body = self.rfile.read(length).decode("utf-8")
…
14 0 Open
API design & gRPC medium

How to Implement Content Negotiation with JSON and XML in Python

Build an HTTP server that returns JSON or XML responses based on the client's Accept header, with a 406 response for unsupported formats.

http-server content-negotiation json
Python
import json
import xml.etree.ElementTree as ET
from http.server import BaseHTTPRequestHandler, HTTPServer


class RequestHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        data = {"message": "Hello, world!"}
        accept_header = self.headers.get("Accept", "")

        if "application/json" in accept_hea…
11 0 Open

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