関連ワード:  python check if string is only letters    python check if string is only letters and numbers    python check if string is all letters    python check if string is all characters    python check if string contains only letters    python check if string contains only letters and spaces    python check if string contains all letters    python check if string is all same character    python check if string is all one character    python check if string contains only alphabets  
結果 : python check if string is only letters