import requests

H, B = {"ApiKey": "YOUR_API_KEY"}, "https://api.sorsa.io/v3"

def ids(endpoint, handle):
    params, out = {"username": handle}, set()
    while True:
        page = requests.get(f"{B}/{endpoint}", headers=H, params=params).json()
        out |= {u["id"] for u in page.get("users", [])}
        if not page.get("next_cursor"):
            return out
        params["next_cursor"] = page["next_cursor"]

a, b = ids("followers", "account_a"), ids("followers", "account_b")
common = a & b
print(len(common), len(common) / len(a | b))  # count and Jaccard similarity