I'm trying to make a function to compare words between two files and output the number of matches. file1 contains: keywords1 keywords2 keywords2 keywords3 keywords3 keywords4 file2 contains (unique words): keywords1 keywords2 keywords3 keywords4 I want to get the number of occurrences of each word from file1 and get the following output: keywords1 = 1 pc keywords2 = 2 pc keywords3 = 2 pc keywords4 = 1 pc At the moment I have written this, but it seems to be not a very good approach. def counterDict( file_path , file_path2 ): source_keywords= [] # Read and parse file keywords use regex with open(file_path, 'r') as file: source = file.read() for pattern in patterns: matches = re.findall(pattern, source) if matches: for match in matches: source_keywords.append(match[1]) counter = Counter(source_keywords).most_common(500) # Read file with words with open(file_path2, 'r') as file: other_file = file.readlines() # I Want to get number of matches every words for word in other_file: for c in counter: if word == c[0]: print(f"{word} == {c[1]}") Upd: I solve my problem with strip line and remove new line. Thanks for all. Continue reading...