Rotator Generator

import random
import requests

PROXIES = [
    'http://user:pass@host:port',
]

TARGET = 'https://httpbin.org/ip'
RETRIES = 3
TIMEOUT = 15

_index = 0


def next_proxy():
    """Pick a random proxy for each request."""
    return random.choice(PROXIES)


def fetch(url=TARGET):
    last_error = None
    for attempt in range(RETRIES):
        proxy = next_proxy()
        try:
            response = requests.get(
                url,
                proxies={"http": proxy, "https": proxy},
                timeout=TIMEOUT,
            )
            response.raise_for_status()
            return response
        except requests.RequestException as error:
            last_error = error
            print(f"attempt {attempt + 1}/{RETRIES} failed via {proxy}: {error}")
    raise RuntimeError(f"all {RETRIES} attempts failed") from last_error


if __name__ == "__main__":
    result = fetch()
    print(result.status_code, len(result.text), "bytes")