实现批量上报的条目数与大小限制

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(____))
    MAX_ITEMS = ____
    MAX_SIZE_BYTES = ____
    def validate_batch(____):
        size = len(payload_str.encode(____))
        if size > MAX_SIZE_BYTES:
            return False, ____, '____'+str(____)+'____'+str(____)+'____'
        try: p = json.loads(____)
        except: return False, ____, '____'
        items = p.get(____)
        if len(____) > MAX_ITEMS:
            return False, ____, '____'+str(len(____))+'____'+str(____)
        return True, ____, '____'+str(len(____))
    test_batches = [
        '____' + '____'.join(____) + '____',
        '____' + '____'.join(____) + '____',
    ]
    for payload in test_batches:
        ok, code, msg = validate_batch(____)
        print("____"+str(____)+"____"+msg)