how to check if text has been entered in a .txt file python code example

Example: how to check for a particular word in a text file using python

file = open("search.txt")
    print(file.read())
    search_word = input("enter a word you want to search in file: ")
    if(search_word in file.read()):
        print("word found")
    else:
        print("word not found")