Function Rate Limiter

A simple Python library to rate limit function calls to a specific number of times per second/minute.

Installation

pip install .

Usage

You can use the @rate_limit decorator to easily limit how frequently a function is executed.

Blocking (Wait)

By default, the rate limiter will block and wait until the function is allowed to run.

import time
from function_rate_limiter import rate_limit

# Allow 2 calls per 5 seconds
@rate_limit(max_calls=2, period=5)
def print_hello():
    print(f"Hello at {time.strftime('%X')}")

for _ in range(5):
    print_hello()

Non-Blocking (Raise Exception)

If you don't want the function to block, set wait=False. It will raise a RateLimitExceeded exception instead.

from function_rate_limiter import rate_limit, RateLimitExceeded

@rate_limit(max_calls=2, period=5, wait=False)
def quick_task():
    print("Doing work...")

try:
    for _ in range(5):
        quick_task()
except RateLimitExceeded as e:
    print(f"Error: {e}")