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中级

生成设备告警统计报表

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中级参考 代码结构已给出，请填写 ____ 处 
def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    alerts_csv = open_url(____).read()
    alerts = pd.read_csv(StringIO(____))
    print(____)
    print("____"+str(len(____)))
    for level, grp in alerts.groupby(____):
        print("____"+level+"____"+str(len(____)))
    print(____)
    for did, grp in alerts.groupby(____):
        print("____"+did+"____"+str(len(____))+"____"+str(list(grp['____'].unique())))
    resolved = alerts[alerts['____']=='____']
    if len(____) > ____:
        resolved = resolved.copy()
        resolved['____'] = pd.to_numeric(____)
        resolved = resolved.dropna(____)
        if len(____) > ____:
            resolved['____'] = resolved['____'] - resolved['____']
            avg_resolve = resolved['____'].mean()
            print("____"+str(round(____))+"____")

示例

输入
solve()
期望输出
Alert statistics report:
Total: 5
  critical: 2
  warning: 3
By device:
  ARD-001: 1 alerts, metrics=['temperature']
  ESP-001: 2 alerts, metrics=['vibration_rms']
  ESP-002: 1 alerts, metrics=['pressure']
  RPI-001: 1 alerts, metrics=['cpu_temp']
Avg resolution time: 60.0 min
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