Opening a zip file from viktor storage

🗪 Support (Q&A)
1

Hi
I have saved a zip file made up of folders and files to viktor storage.
i now want to extract specific files from the stored file.

when it was a zip file i could quite simply use zipfile.ZipFile, however it is now a viktor.File object (typically considered to be a single file.).

this is probably a more general python question, but can anyone give me some guidance.
for note, the files of interest in the zip file are json files.

Thanks in advance

2

Hi Natalie,

Thanks for your question. The VIKTOR File object can be converted to bytes or strings by using the getvalue and getvalue_binary method respectively. Knowing that, you can look into the ZipFile documentation how to convert bytes to a ZipFile. After a quick Google search I found this StackOverflow link:

Taking the answer presented there, this is how you will probably convert a VIKTOR File object to a ZipFile object:

import zipfile
import io
from viktor import File, Storage

storage = Storage()
my_file_from_storage = storage.get('data_key_1', scope='entity')
z = my_file_from_storage.getvalue_binary()
zf = zipfile.ZipFile(io.BytesIO(z), "r")
for fileinfo in zf.infolist():
    print(zf.read(fileinfo).decode('ascii'))

Let me know if this works.

3

It works but seems to time out when looping for multiple zip files. but the theory works well for a single file