分析订餐高峰时段与备餐建议

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    orders=pd.read_csv(StringIO(open_url(____).read()))
    active=orders[orders['____']=='____']
    by_dt=active.groupby(____).size().reset_index(____)
    print(____)
    for mtype,grp in by_dt.groupby(____):
        avg=round(grp['____'].mean(),____); peak=grp['____'].max()
        peak_date=grp.loc[grp['____'].idxmax(),'____']
        print(____)