Reference library

Reliability & rate limiting

Retries, exponential backoff, circuit breakers, token buckets, and idempotent handlers.

5 matches

How to Build a Rate Limiter in Python

A beginner-friendly token bucket rate limiter with retry logic for handling API rate limits in Python.

import time
import random

class RateLimiter:
    """Simple token bucket rate limiter for beginners."""
    
    def __init__(self, max_tokens=5, refill_rate=1.0):
        self.max_tokens = max_tokens
        self.tokens = max_tokens
        self.refill_rate = refill_rate  # tokens per second
        self.last_refill …

15 0 Open

Reliability & rate limiting easy

How to Implement a Rate Limiter in Python

A beginner-friendly Python class that tracks call timestamps with a deque to allow or block calls based on a max rate per time period.

rate-limit deque time

Python

import time
from collections import deque


class RateLimiter:
    """Simple rate limiter for beginners."""

    def __init__(self, max_calls: int, period_seconds: float):
        self.max_calls = max_calls
        self.period = period_seconds
        self.calls = deque()

    def allow(self) -> bool:
        """Retur…

16 0 Open

Reliability & rate limiting easy

How to implement rate limiting in Python

A beginner-friendly Python rate limiter that throttles API calls and retries parsing tasks with exponential backoff.

rate-limiting retry parsing

Python

import time
import random

class RateLimiter:
    def __init__(self, max_calls, per_seconds):
        self.max_calls = max_calls
        self.per_seconds = per_seconds
        self.timestamps = []
    
    def allow(self):
        now = time.time()
        self.timestamps = [t for t in self.timestamps if now - t < sel…

15 0 Open

Reliability & rate limiting easy

Rate Limiting in Python with a Sliding Window

A beginner-friendly dataclass-based sliding window rate limiter that controls how many calls are allowed per time window.

rate-limiting sliding-window dataclass

Python

import time
from dataclasses import dataclass


@dataclass
class RateLimiter:
    max_calls: int
    window_seconds: float = 1.0

    def __post_init__(self):
        self.calls = []
        self._start = time.monotonic()

    def _update(self, now):
        self.calls = [t for t in self.calls if now - t < self.window…

12 0 Open

Reliability & rate limiting easy

Rate Limiting with a Simple Python RateLimiter Class

A beginner-friendly Python rate limiter that tracks call timestamps and enforces a maximum number of calls within a rolling time window, with a helper to validate positive integers.

rate-limiting time api

Python

import time

class RateLimiter:
    def __init__(self, max_calls, period_seconds):
        self.max_calls = max_calls
        self.period_seconds = period_seconds
        self.calls = []

    def is_allowed(self):
        now = time.time()
        while self.calls and now - self.calls[0] >= self.period_seconds:
      …

13 0 Open

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