回答編集履歴
2
追記
test
CHANGED
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@@ -45,3 +45,25 @@
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45
45
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print(lis)
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46
46
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47
47
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```
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48
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+
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49
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+
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50
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+
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51
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+
追記
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52
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53
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---
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54
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+
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55
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+
こんなふうにも書けます。
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56
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+
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57
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+
```Python
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58
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+
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59
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+
work_set = set()
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60
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+
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61
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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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62
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+
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63
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print(lis)
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64
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65
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```
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66
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+
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67
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68
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+
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69
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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
test
CHANGED
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@@ -17,3 +17,31 @@
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17
17
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print(lis)
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18
18
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19
19
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```
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20
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+
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21
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+
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22
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23
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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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24
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+
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25
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+
```Python
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26
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27
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lis = ["hoge","hogehoge","fuga","fugafuga","hoge","fuga"]
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28
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+
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29
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30
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31
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appeared = set()
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32
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33
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for i, e in enumerate(lis):
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34
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+
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35
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if e in appeared:
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36
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+
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37
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lis[i] += "_2"
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38
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+
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39
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else:
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40
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+
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41
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appeared.add(e)
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42
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43
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+
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44
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+
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45
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print(lis)
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46
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+
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47
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```
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