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中级

生成月度贷款质量五级分类汇总表

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
    clients_csv = open_url(____).read()
    loans_csv = open_url(____).read()
    loan_classifications_csv = open_url(____).read()
    loan_provisions_csv = open_url(____).read()
    import sqlite3, pandas as pd
    from io import StringIO
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    total = pd.read_sql_query(____).iloc[____]['____'] or ____
    order = {'____':____,'____':____,'____':____,'____':____,'____':____}
    result = pd.read_sql_query(____)
    result['____'] = (____).round(____)
    result['____'] = result['____'].map(____)
    result = result.sort_values(____).drop(____)
    print(result.to_string(____))
    conn.close()

示例

输入
solve()
期望输出
classification  loan_count  balance  balance_pct
        NORMAL           8  4536000        75.75
         WATCH           1    52000         0.87
   SUBSTANDARD           2  1378000        23.01
      DOUBTFUL           1    22000         0.37
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