回答編集履歴
1
関数名変更
answer
CHANGED
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@@ -2,7 +2,7 @@
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2
2
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```Python
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3
3
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from collections import Counter
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4
4
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5
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-
def
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5
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+
def flatten_2dim(list_2dim):
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return [e for row in list_2dim for e in row]
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7
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my_list = [
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@@ -10,7 +10,7 @@
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['a', 'c', 'c', 'd'],
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['b', 'e', 'e', 'f']
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]
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-
counter = Counter(
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+
counter = Counter(flatten_2dim(my_list))
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my_list = [
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[e for e in row if counter[e] >= 2] for row in my_list
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]
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