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初级

检查账单必填字段完整性

未完成
初级参考 完整示例代码供参考，建议自己理解后重新输入 
def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    txs = pd.read_csv(StringIO(open_url("https://data.zuihe.com/dbd/ms-ledger/state_02/transactions.csv").read()))
    REQUIRED = ['tx_id','user_id','category_id','amount','tx_date','merchant_name']
    print("Data integrity check:")
    for field in REQUIRED:
        nulls = txs[field].isna().sum() if field in txs.columns else len(txs)
        print(f"  {field}: {'OK' if nulls==0 else f'ISSUES:{nulls}'} ({len(txs)-nulls}/{len(txs)})")
    print(f"  Negative amounts: {len(txs[txs['amount']<=0])}")

示例

输入
solve()
期望输出
Data integrity check:
  tx_id: OK (250/250)
  user_id: OK (250/250)
  category_id: OK (250/250)
  amount: OK (250/250)
  tx_date: OK (250/250)
  merchant_name: OK (250/250)
  Negative amounts: 0
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