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中级

统计各品类询价量与出价转化率

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
    from io import StringIO
    import pandas as pd
    inquiries=pd.read_csv(StringIO(open_url(____).read()))
    products=pd.read_csv(StringIO(open_url(____).read()))
    merged=inquiries.merge(____)
    stats=merged.groupby(____).agg(inq_count=(____),offer_count=('____',lambda x:(____).sum())).reset_index()
    stats['____']=(____).round(____)
    print(____)
    for _,r in stats.sort_values(____).iterrows():
        print(____)

示例

输入
solve()
期望输出
Inquiry & offer rate by category:
  clothing: inquiries=41 offers=28 offer_rate=68.3%
  furniture: inquiries=41 offers=13 offer_rate=31.7%
  electronics: inquiries=39 offers=23 offer_rate=59.0%
  sports: inquiries=31 offers=18 offer_rate=58.1%
  other: inquiries=25 offers=15 offer_rate=60.0%
  books: inquiries=23 offers=7 offer_rate=30.4%
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