python - How to find words that are not the same between two text files -

i have 2 text documents, contain of same words, there few exceptions. how find words in document2 not anywhere in document1 , print them out? example:

document1: "hello there how you"

document2: "hi how today john"

desired output: "hi today john"

edit: print words present in document2 , not found anywhere in document1. don't want print words same between them.

i created code think finds matches between 2 text files, not want do:

doc1 = open("k:\system files\desktop\document1.txt", "r+") doc2 = open("k:\system files\desktop\document2.txt", "r+")  list1 = [] list2 = []  in doc1: #removes new line after each word     = i[:-1]     list1.append(i) in doc2:     = i[:-1]     list2.append(i)  in list1:     j in list2:         if == j:             print(i) 

if not worried order of words, use sets accomplish follows:

import re  def get_words(filename):     open(filename, 'r') f_input:         return set(w.lower() w in re.findall(r'(\w+)', f_input.read()))  words1 = get_words('document1.txt') words2 = get_words('document2.txt')  print words2 - words1 

this display:

set(['john', 'hi', 'today']) 

using - on 2 sets has effect of giving difference between 2 sets.