# Paket metama’lumotlari va trafik tahlili
# Faqat sintetik, lokal o‘quv misoli.

packets = [{"port": 443, "bytes": 120}, {"port": 53, "bytes": 60},
           {"port": 443, "bytes": 180}]
print(sum(p["bytes"] for p in packets if p["port"] == 443))