Cached anti spam system for telegram bots written in python

antispam.py

import time as tm
spams = {}
msgs = 4 # Messages in
max = 5 # Seconds
ban = 300 # Seconds

def is_spam(user_id):
    try:
        usr = spams[user_id]
        usr["messages"] += 1
    except:
        spams[user_id] = {"next_time": int(tm.time()) + max, "messages": 1, "banned": 0}
        usr = spams[user_id]
    if usr["banned"] >= int(tm.time()):
        return True
    else:
        if usr["next_time"] >= int(tm.time()):
            if usr["messages"] >= msgs:
                spams[user_id]["banned"] = tm.time() + ban
                # text = """You're banned for {} minutes""".format(ban/60)
                # bot.send_message(user_id, text)
                # User is banned! alert him...
                return True
        else:
            spams[user_id]["messages"] = 1
            spams[user_id]["next_time"] = int(tm.time()) + max
    return False

Man, is an Anti-flood, not an Anti-scam...

it is an anti-"sPam" bot not "scam"