関連ワード:  python check if a string in a list    python check for a string in a list    python check if a string exists in a list    python check if a string is not in a list    python check if a string is present in a list    python search for a string in a list    python check if a string contains a list of substrings    python check if string in list case insensitive    python check if string in list of dictionaries    python check if string in list of tuples