将三种格式统一为标准格式

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd, json
    devs_csv = open_url(____).read()
    devs = pd.read_csv(StringIO(____))
    def normalize(____):
        p = json.loads(____)
        rows = []
        if fmt == '____':
            for r in p.get(____):
                rows.append({'____':device_id,'____':p['____'],'____':r['____'],'____':r['____'],'____':r.get(____)})
        elif fmt == '____':
            mapping = {'____':(____),'____':(____),'____':(____),'____':(____)}
            for k,(____) in mapping.items():
                if k in p: rows.append(____)
        return rows
    tests = [
        (____),
        (____),
    ]
    all_rows = []
    for did,fmt,payload in tests:
        rows = normalize(____)
        all_rows.extend(____)
    print("____" + str(len(____)))
    for row in all_rows:
        print("____" + row['____'] + "____" + row['____'] + "____" + str(____) + row['____'])