Pythonで LeftStrRightStr Substringなどの処理はsliceのみです。 ↑のコードは、2文字目〜3文字目を取得できます s2 = 「いう」です。

# Both find() and index() locate the position of a specified substring within a string. # However, they differ in their behavior when the substring is not found ...

Given a string s, find the length of the longest substring without repeating characters. charset=set() "we convert to set so it doesn't add dupicate values to the substring" l=0 "set left pointer to 0 ...