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中级

实现账户余额实时快照（版本控制）

未完成
中级参考 代码结构已给出，请填写 ____ 处 
def solve():
    from pyodide.http import open_url
    offices_csv = open_url(____).read()
    staff_csv = open_url(____).read()
    currencies_csv = open_url(____).read()
    savings_products_csv = open_url(____).read()
    interest_rate_charts_csv = open_url(____).read()
    clients_csv = open_url(____).read()
    savings_accounts_csv = open_url(____).read()
    savings_account_transactions_csv = open_url(____).read()
    gl_accounts_csv = open_url(____).read()
    journal_entries_csv = open_url(____).read()
    charges_csv = open_url(____).read()
    savings_account_charges_csv = open_url(____).read()
    clearing_records_csv = open_url(____).read()
    cob_job_logs_csv = open_url(____).read()
    account_balance_snapshots_csv = open_url(____).read()
    exchange_rates_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(____)
    result = pd.read_sql_query(____)
    print(result.to_string(____))
    conn.close()

示例

输入
solve()
期望输出
account_id  snapshot_balance  current_balance  change_amount
         21        1350384.25        1250000.0     -100384.25
         25         775222.60         875000.0       99777.40
         24         275000.00         195000.0      -80000.00
         15         550157.81         500000.0      -50157.81
         23         570164.38         620000.0       49835.62
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