回答編集履歴
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コード記載
test
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@@ -1 +1,65 @@
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2列目（確率）を大きさ順に並び替えて、3列目を指定した重複削除をおこなってはどうでしょうか。
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```python3
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import pandas as pd
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import io
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txt ="""
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0 1 2 3
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14
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15
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0 339.0 106.0 0.632479 2.0
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16
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17
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1 407.0 115.0 0.906053 3.0
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2 458.0 115.0 0.910999 4.0
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20
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21
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3 314.0 221.0 0.572901 8.0
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22
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23
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4 149.0 252.0 0.131463 8.0
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24
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5 385.0 260.0 0.891231 9.0
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26
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6 216.0 257.0 0.106395 10.0
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7 335.0 317.0 0.640136 10.0
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30
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31
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8 367.0 67.0 0.950752 14.0
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32
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33
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9 346.0 72.0 0.909803 16.0
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34
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"""
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df = pd.read_table(io.StringIO(txt),delimiter="\s+")
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df = df.sort_values("2", ascending=False).drop_duplicates(subset="3").sort_values("3")
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print(df)
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0 1 2 3
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48
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49
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0 339.0 106.0 0.632479 2.0
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1 407.0 115.0 0.906053 3.0
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53
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2 458.0 115.0 0.910999 4.0
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54
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55
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3 314.0 221.0 0.572901 8.0
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56
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57
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5 385.0 260.0 0.891231 9.0
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58
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7 335.0 317.0 0.640136 10.0
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61
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8 367.0 67.0 0.950752 14.0
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62
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63
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9 346.0 72.0 0.909803 16.0
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64
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65
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```
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