How to search for a string in text files?

Question

I want to check if a string is in a text file. If it is, do X. If it\'s not, do Y. However, this code always returns True for some reason. Can anyone see what i

Answer 1

If user wants to search for the word in given text file.

 fopen = open('logfile.txt',mode='r+')

  fread = fopen.readlines()

  x = input("Enter the search string: ")

  for line in fread:

      if x in line:

          print(line)