関連ワード:  python find index of a char in a string    python find index of a substring in a string    python find position of a character in a string    python find index of a letter in string    python find last index of a character in string    python find index of character in string backwards    python find the position of a substring in a string    python find indices of character in string    python find index of first character in string    python return index of char in string  
結果 : python find index of a char in a string