関連ワード:  python check if string is all whitespace    python check if string is only whitespace    python check if a string is whitespace    python check if string is whitespace or empty    python check if string is not whitespace    python check if string is white space    python check if string is empty or whitespace or null    python check if string is null or whitespace    python check if a string contains whitespace  
結果 : python check if string is all whitespace