Reference library

A/B testing & experimentation

User bucketing, experiment metrics, statistical comparison, and rollout guardrails.

3 matches

How to Evaluate Feature Flags in Python

A Python function that evaluates boolean feature flags with user-specific overrides, returning whether a flag is enabled and the reason for the decision.

feature flags ab testing experimentation

Python

import json

def evaluate_feature_flag(feature_name, context, flag_configs):
    """
    Evaluates a boolean feature flag given a context dictionary.

    Args:
        feature_name: The name of the feature flag.
        context: A dictionary of user/request context (e.g., {"user_id": "123"}).
        flag_configs: A …

14 0 Open

A/B testing & experimentation medium

How to Mock Time for Cache TTL Testing in Python

This code demonstrates how to test a cache's TTL expiration logic by mocking time.time with unittest.mock to control the passage of time.

caching ttl unit-testing

Python

import time
from unittest.mock import patch

class ConfigCache:
    def __init__(self, ttl=60):
        self.ttl = ttl
        self._store = {}
        self._timestamps = {}

    def get(self, key):
        if key not in self._store:
            return None
        if time.time() - self._timestamps[key] > self.ttl:
  …

17 0 Open

A/B testing & experimentation easy

How to Mock a Remote Config Fetch in Python

Simulate a remote config API response with metadata, timestamps, and mock data for testing or local development.

mock config testing

Python

import json
from datetime import datetime
from typing import Any, Dict

def fetch_remote_config(mock_data: Dict[str, Any]) -> Dict[str, Any]:
    """Simulate fetching a remote config with metadata and timestamps."""
    return {
        "status": "success",
        "source": "mock",
        "fetched_at": datetime.utcn…

14 0 Open

Browse by section

Each section groups closely related Python snippets.