回答編集履歴
2
追記
answer
CHANGED
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@@ -21,4 +21,15 @@
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21
21
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appeared.add(e)
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22
22
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23
23
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print(lis)
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24
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-
```
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24
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+
```
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25
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+
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26
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+
追記
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27
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+
---
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28
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+
こんなふうにも書けます。
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29
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+
```Python
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30
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work_set = set()
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31
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lis = [e + '_2' if e in work_set else work_set.add(e) or e for e in lis]
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32
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print(lis)
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33
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+
```
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34
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+
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35
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+
でもあんまり行儀の良いコードでは無いですね。避けた方が良いでしょう。
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1
追記
answer
CHANGED
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@@ -7,4 +7,18 @@
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7
7
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lis[i] += "_2"
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8
8
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9
9
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print(lis)
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10
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+
```
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11
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+
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12
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lisがもっと長いなら、次のように別途記憶領域を用意した方が効率的です。
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13
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```Python
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14
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lis = ["hoge","hogehoge","fuga","fugafuga","hoge","fuga"]
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15
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+
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16
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appeared = set()
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17
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for i, e in enumerate(lis):
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18
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if e in appeared:
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19
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lis[i] += "_2"
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20
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else:
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21
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appeared.add(e)
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22
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+
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23
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print(lis)
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10
24
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```
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