对比自提与快递订单的平均成交价

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    orders=pd.read_csv(StringIO(open_url("https://data.zuihe.com/dbd/ms-campustrade/state_01/orders.csv").read()))
    pickup=orders[orders['delivery_method']=='self_pickup']
    express=orders[orders['delivery_method']=='express']
    print(f"Self pickup: count={len(pickup)} avg_price={round(pickup['price'].mean(),1)}")
    print(f"Express: count={len(express)} avg_price={round(express['price'].mean(),1)}")