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初级

统计卡片组数量与主题分布

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
    decks=pd.read_csv(StringIO(open_url("https://data.zuihe.com/dbd/ms-memcard/state_00/decks.csv").read()))
    print(f"Total decks: {len(decks)}")
    print(f"By subject: {dict(decks.groupby('subject').size())}")
    print(f"Shared decks: {len(decks[decks['is_shared']==1])}")
    print(f"Avg cards per deck: {round(decks['card_count'].mean(),1)}")
    top_themes=decks.groupby('theme_code').size().nlargest(5)
    print("Top themes:")
    for theme,count in top_themes.items():
        print(f"  {theme}: {count} decks")

示例

输入
solve()
期望输出
Total decks: 65
By subject: {'general': np.int64(6), 'humanities': np.int64(9), 'language': np.int64(18), 'professional': np.int64(6), 'science': np.int64(12), 'tech': np.int64(14)}
Shared decks: 26
Avg cards per deck: 28.5
Top themes:
  programming: 14 decks
  en_vocab: 8 decks
  math: 7 decks
  es_vocab: 5 decks
  history: 5 decks
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