関連ワード:  python script to find word in file    python program to find longest word in file    python script find string in file    python program to search a word in file    python script to search string in excel file    python script to find and replace string in a file    python program to find most common words in a file    python program to find frequency of words in a file    python script to search a string in multiple files    python code to find a string in a file