Observability & SRE
Structured logging, metrics, tracing, health checks, and SLO-friendly instrumentation.
How to Check Service Readiness Dependencies in Python
This code simulates a readiness check for external dependencies (database, cache, queue) with mock availability data and reports readiness status.
import sys
from datetime import datetime
def check_dependencies(config):
results = []
for dep, required in config.items():
available = mock_availability(dep)
status = "READY" if available >= required else "NOT READY"
results.append((dep, available, required, status))
return result…How to Track Cache Hit Ratio in Python
Simulate an LRU cache with hit/miss tracking and compute a real-time hit ratio from random access patterns.
import random
import time
from collections import OrderedDict
class LRUCache:
def __init__(self, capacity: int):
self.cache = OrderedDict()
self.capacity = capacity
self.hits = 0
self.misses = 0
def get(self, key):
if key in self.cache:
self.hits += 1
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Observability & SRE — Python code examples
What you will find here
This page collects observability & sre snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.
Samples vs tutorials and challenges
Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.