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中级

实现支付冲正已成功交易撤销

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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
    account_types_csv = open_url(____).read()
    payment_channels_csv = open_url(____).read()
    accounts_csv = open_url(____).read()
    transfers_csv = open_url(____).read()
    disputes_csv = open_url(____).read()
    import sqlite3, pandas as pd
    from io import StringIO
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    tx = pd.read_sql_query(____).iloc[____]
    before = pd.read_sql_query(____)
    conn.execute("____", (____))
    conn.execute("____", (____))
    conn.execute(____)
    conn.commit()
    after = pd.read_sql_query(____)
    result = before.copy()
    result.columns = ['____', '____']
    result['____'] = after['____'].values
    print(result.to_string(____))
    conn.close()

示例

输入
solve()
期望输出
account_no  before_balance  after_balance
6212001000000001         55000.0        55000.0
6212001000000002         18500.0        18500.0
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