Convert a possibly multibyte string to a safely splittable format.s is the string to split.Uses the input_codec to try and convert the string to Unicode,so it can be safely split on character boundaries (even for multibytecharacters).Returns the string as-is if it isn't known how to convert s toUnicode with the input_charset.Characters that could not be converted to Unicode will be replaced with the Unicode replacement character "U+FFFD". おそらくマルチバイトの文字列を、安全に split できる形式に変換します。 - Python
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