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Python Code Samples

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

4 matches
Automation & scripting medium

How to Create a Mock Docker Registry Auth Token Server in Python

Build a mock Docker Registry token authentication server that issues signed JWT-like tokens for push and pull access using Python's standard library.

docker registry jwt
Python 
import base64
import hashlib
import hmac
import json
import time
from http.server import BaseHTTPRequestHandler, HTTPServer


class TokenAuthHandler(BaseHTTPRequestHandler):
    """Mock Docker Registry token authentication server."""

    SECRET_KEY = b"mock-secret-key"

    def generate_token(self, username: str, pas…
16 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
ML engineering pipelines medium

How to Mock MLflow Model Registration in Python

Build a lightweight in-memory mock of MLflow's MlflowClient to test model registration, versioning, and stage transitions without a tracking server.

mlflow mocking model-registry
Python 
from mlflow.tracking import MlflowClient
from mlflow.entities import ModelVersion, Model


class MockMlflowClient:
    """Minimal mock of MlflowClient's model registration methods."""
    
    def __init__(self):
        self.registered_models = {}
        self.model_versions = {}
    
    def register_model(self, mod…
14 0 Open
Production deployment patterns medium

How to Mock Kubernetes Services with a ClusterIP Registry in Python

Simulate Kubernetes service discovery by assigning ClusterIP addresses to dataclass-defined services, with JSON export for inspection or testing.

kubernetes clusterip mock
Python 
import json
from dataclasses import dataclass, asdict
from typing import Dict, Optional


@dataclass
class Service:
    name: str
    namespace: str
    cluster_ip: str
    selector: Dict[str, str]
    port: int
    target_port: Optional[int] = None


class ClusterIPServiceRegistry:
    _ip_counter = 0

    def __init…
13 0 Open

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