関連ワード:  python checking if string is in list    python check if string is in list case insensitive    python check if string is in list of dictionaries    python check if string is not in list    python check if string is present in list    python check if string is contained in list    python check if string is in any list element    python check if string value is in list    python check if string is already in list    python check if string is substring in list