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import re
k = "X"
print( re.split(fr"(?a)\b{k}\b", "X测试一Q测试二XQ测试三") )

Success #stdin #stdout 0.04s 9400KB

stdin

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Standard input is empty

stdout

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['', '测试一Q测试二XQ测试三']

https://ideone.com/szgnV7

language:

Python 3 (python 3.12)

created:

visibility:

secret

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