Proxies for Instagram and SMM: a separate IP per account

# pip install "requests[socks]"
import time, requests
from concurrent.futures import ThreadPoolExecutor

LINES_FILE = "flex_lines.txt"
PROTOCOL = "http"
CHECK_URL = "https://ipinfo.io/json"
PAUSE_SEC = 600

def proxy(line):
    host, port, login, password = line.split(":")
    scheme = "socks5h" if PROTOCOL == "socks5" else "http"
    url = f"{scheme}://{login}:{password}@{host}:{port}"
    return {"http": url, "https": url}

def exit_ip(line):
    try:
        data = requests.get(CHECK_URL, proxies=proxy(line), timeout=20).json()
        return data.get("ip", ""), data.get("country", "")
    except (requests.RequestException, ValueError):
        return "", ""

lines = [line.strip() for line in open(LINES_FILE, encoding="utf-8") if line.count(":") == 3]
with ThreadPoolExecutor(50) as executor:
    first = list(executor.map(exit_ip, lines))
    print(f"{len(lines)} lines checked, second pass in {PAUSE_SEC // 60} min")
    time.sleep(PAUSE_SEC)
    second = list(executor.map(exit_ip, lines))

seen = {}
for n, ((ip, country), (ip2, _)) in enumerate(zip(first, second), 1):
    status = "no answer" if not ip else "same IP" if ip == ip2 else f"changed to {ip2 or 'no answer'}"
    if ip in seen:
        status += f", same IP as line {seen[ip]}"
    elif ip:
        seen[ip] = n
    print(f"{n:>4}  {country or '--':2}  {ip or '-':15}  {status}")