统计设备在线率（按区域）

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    scr_csv = open_url(____).read()
    screens = pd.read_csv(StringIO(____))
    print(____)
    for region, grp in screens.groupby(____):
        total = len(____); online = len(____)
        rate = round(____) if total>____ else ____
        bar = '____'*int(____)
        print("____"+str(____)+"____"+str(____)+"____"+str(____)+"____"+str(____)+"____"+bar)
    overall = len(____)
    print("____"+str(____)+"____"+str(len(____))+"____"+str(round(overall/len(____)*____,____))+"____")