Python API Client: Connect to Any REST API in 5 Minutes Every web service has an API. Here's how to build a robust Python API client that handles auth, retries, rate limiting, and pagination. Base API Client Class import requests import time import logging from typing import Any , Optional , Dict from urllib.parse import urljoin logger = logging . getLogger ( __name__ ) class APIClient : """ Reusable REST API client with auth, retry, and rate limiting. """ def __init__ ( self , base_url : str , api_key : str = None , timeout : int = 30 , max_retries : int = 3 , rate_limit_per_second : float = 10 ): self . base_url = base_url . rstrip ( ' / ' ) self . timeout = timeout self . max_retries = max_retries self . min_interval = 1.0 / rate_limit_per_second self . _last_request_time = 0 self . session = requests . Session () if api_key : self . session . headers . update ({ ' Authorization ' : f ' Bearer { api_key } ' , ' Content-Type ' : ' application/json ' }) def _wait_for_rate_limit ( self ): elapsed = time .…