Python: Count uniq line(s) between 2 files
Question: 
     First File | Second File
    
        bob        | greg
        bob        | larry
        mark       | mark
        larry      | bruce
        tom        | tom
    

With the code bellow I get output: **bob** , but I need to get **bob x 2**

    
    
    with open('some_file_1.txt', 'r') as file1:
         with open('some_file_2.txt', 'r') as file2:
             diff = set(file1).difference(file2)
    
     with open('some_output_file.txt', 'w') as file_out:
         for line in same:
            file_out.write(line)
    


Answer: Sounds like you want the difference of two `collections.Counter` objects.

    
    
    import collections
    
    with open("file1.txt") as f1, open("file2.txt") as f2:
        c1, c2 = collections.Counter(f1), collections.Counter(f2)
        result = c1 - c2
        # Counter({"bob": 2})
    
    with open("output.txt", "w") as outf:
        for line, count in result.items():
            outf.write("{} x {}".format(line, count))
    

