Concatenating dump files

Question

How to open a dump file (binary)? the answer provided in this question isn't working

filenames = ['file1.dmp', "file2.dmp", "file3.dmp"]
with open('test_file.obj', 'w') as outfile:
    for fname in filenames:
        with open(fname) as infile:
            for line in infile:
                outfile.write(line)

file1: 367kb
file2: 1kb
file3: 1000kbp

The output file is only 5kb

When I count lines in the file it returns 4 when I know its much bigger. I think it has to do with the HEX representation which python isn't able to parse?

How many lines in each file that you have? Have you tried to write into `wb` mode? Also, you probably need to read files into `rb` mode. — Dmytro Chasovskyi, Jan 15 '19 at 10:23

score 1 · Accepted Answer · answered Jan 15 '19 at 10:58

Hi you are opening the output file with 'w' which won't work mostly for binary files you can open file in wb and then try it.

filenames = ['file1.dmp', "file2.dmp", "file3.dmp"]
with open('test_file.obj', 'wb') as outfile:
    for fname in filenames:
        with open(fname, 'rb') as infile:
            for line in infile:
                outfile.write(line)

Concatenating dump files

1 Answers1