関連ワード:  python return index of letter in string    python find index of letter in string    python return index of character in string    python find index of character in string    python find index of character in string backwards    python get indices of character in string    python find indices of character in string    python find index of first letter in string    python find last index of character in string    python get last index of character in string  
結果 : python return index of letter in string