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Python Code Samples

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

4 matches
Modern tooling easy

How to Mock BugSnag Notify in Python

Use unittest.mock to simulate BugSnag notifications, verify calls, and test error handling without external dependencies.

mocking bugsnag testing
Python 
import mock

bugsnag = mock.MagicMock()

def notify_error(message, severity="error"):
    bugsnag.notify(message, severity=severity)

if __name__ == "__main__":
    notify_error("Test error", severity="warning")
    bugsnag.notify.assert_called_once_with("Test error", severity="warning")
    print("Mocked BugSnag noti…
16 0 Open
System design patterns easy

How to Mock Hexagonal Architecture Ports and Adapters in Python

Mock an email adapter in a hexagonal architecture with unittest.mock to test business logic in isolation.

hexagonal-architecture unittest-mock dependency-injection
Python 
from unittest.mock import Mock

class EmailService:
    def send(self, recipient, message):
        raise NotImplementedError

class OrderProcessor:
    def __init__(self, email_service):
        self.email_service = email_service
    
    def process_order(self, order_id, customer_email):
        # Business logic
   …
15 0 Open
Caching & Redis easy

How to Implement Namespaced Cache Keys for Tenant Isolation in Python

Build a tenant-aware cache wrapper that prefixes keys with tenant and namespace, and test it with mocks.

cache tenant namespace
Python 
from keyvaluestore import SimpleCache
from unittest.mock import patch

class TenantCache(SimpleCache):
    def __init__(self, tenant_id, namespace="default"):
        super().__init__()
        self.tenant_id = tenant_id
        self.namespace = namespace

    def _key(self, key):
        return f"tenant:{self.tenant_…
17 0 Open
Production deployment patterns medium

How to Smoke Test a Deployment in Python with unittest.mock

Run a post-deploy smoke test by mocking the deployment status check to verify your health-check logic returns PASS/FAIL.

deployment smoke-test unittest-mock
Python 
import unittest
from unittest.mock import Mock, patch

class DeploymentService:
    def check_status(self):
        return "unknown"

def smoke_test_deploy():
    service = DeploymentService()
    with patch.object(service, "check_status", return_value="healthy") as mock_check:
        status = service.check_status()
…
13 0 Open

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