CODEWITHSUNDEEP
pythonfiltertarfile
akya
akya

Reputation: 99

Python: using filter in tarfile

I am writing a backup script which uses tarfile module. I am a beginner in python. Here is part of my script - So I have a list of paths that need to be archived in tar.gz. seeing this post, I came up with following. Now archive gets created but the files with .tmp and .data extension aren't getting omitted. I am using python 3.5

L = [path1, path2, path3, path4, path5]
exclude_files = [".tmp", ".data"]
# print L

def filter_function(tarinfo):
     if tarinfo.name in exclude_files:
          return None
     else:
          return tarinfo

with tarfile.open("backup.tar.gz", "w:gz") as tar:
     for name in L:
        tar.add(name, filter=filter_function)

Upvotes: 4

Views: 5057

Answers (1)

Jean-François Fabre
Jean-François Fabre

Reputation: 140307

you're comparing the extensions vs the full names.

Just use os.path.splitext and compare the extension:

 if os.path.splitext(tarinfo.name)[1] in exclude_files:

shorter: rewrite your add line with a ternary expression and a lambda to avoid the helper function:

tar.add(name, filter=lambda tarinfo: None if os.path.splitext(tarinfo.name)[1] in exclude_files else tarinfo)

Upvotes: 2

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