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Python Code Samples

Copy-ready Python snippets by topic and difficulty — short, focused, and runnable in the browser editor.

99 matches
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
Production deployment patterns easy

How to Mock a Dependency for Readiness Probe in Python

Use unittest.mock.Mock to simulate a dependency's readiness check response for testing a service's is_ready method without hitting a real connection.

unittest.mock mock readiness probe
Python 
import time
import unittest
from unittest.mock import Mock

class Service:
    def __init__(self, dependency):
        self.dependency = dependency

    def is_ready(self):
        try:
            result = self.dependency.check()
            return result == "ready"
        except Exception:
            return False
…
17 0 Open
Production deployment patterns easy

How to build a maintenance mode page in Python

Mock a service maintenance status page that computes remaining downtime and lists affected features from a simple class.

maintenance status datetime
Python 
from datetime import datetime

class MaintenanceMode:
    """Mock a maintenance mode status page for a service."""
    
    def __init__(self, service_name: str, scheduled_end: str):
        self.service_name = service_name
        self.scheduled_end = datetime.fromisoformat(scheduled_end)
        self.affected_featur…
14 0 Open

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